4 years ago

Which value is needed to create a perfect square trinomial from the expression x2 + 8x + _____?

1 answer:

4 0

To solve this problem, divide 8 by 2 and then square the product.

$x^2 + 8x$
$\frac{8}{2} = 4$
Square 4
$4^2 = 16$
Answer = $x^2 + 8x + 16$

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3 years ago

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$\dfrac{x}{-2}=4\ \ \ |multiply\ both\ sides\ by\ (-2)\\\\(-2)\cdot\dfrac{x}{-2}=(-2)\cdot4\\\\\boxed{x=-8}\\\\\dfrac{x}{3}+13=13\ \ \ |subtract\ 13\ from\ both\ sides\\\\\dfrac{x}{3}+13-13=13-13\\\\\dfrac{x}{3}=0\ \ \ |multpily\ both\ sides\ by\ 3\\\\\not3^1\cdot\dfrac{x}{\not3_1}=0\\\\\boxed{x=0}$

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6 0

3 years ago

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The roots of a function are when y=0. The function seems to cross the x-axis at -3,-1, and 8.
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4 years ago