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M$10 Answers
If, however, you are asked "solve the equation x^2 = 144"
then the answer is both +12 and - 12. That is because this is asking a different question: "solving x^2 = 144" means to find all possible numbers x that satisfy the equation, and both + and - 12 do satisfy the equation.
But when asked for "the square root of 144" the answer is +12.
(This is why in the quadratic equation we write " +/- sqrt(b^2-4ac) " : to signify we are solving for all possible values and not simply taking a square root , and so we want both the + and the -
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You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
My math brain!
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M$
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$Mr. Charles Ferrari, my 9th grade math teacher @ Antelope Valley High School.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
Square roots are always positive.
From Wikipedia:
The principal square root function f(x) = \sqrt{x} is a function which maps the set of non-negative real numbers R+ ∪ {0} onto itself.
Great detailed answer, but yes, they are never negative.