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Question:

# Solve for x: $x^2+10x+9=0$

A -1 or -9
explanation

Factor the quadratic equation: $x^2+10x+9=0$
$(x+1)(x+9)=0$
For this expression to be true, the left side of the expression must equal zero. Therefore, either (x + 1) or (x + 9) must equal zero:
If (x + 1) = 0, x must equal -1
If (x + 9) = 0, x must equal -9
So the solution is that x = -1 or -9.

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3 years ago

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3 years ago

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3 years ago

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