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Question

Check the solutions after solving each equation.

x2=15+8xx^2=-15+8 x

Solution

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Answered 1 year ago
Answered 1 year ago
Step 1
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We must solve the given equation, and then check our solution.

x2=15+8xx^2 = -15 + 8x

Rewrite the given equation:

x28x+15=0\blue{x^2} -8x+15=0

Find two integers which multiplied give x2\blue{x^2}.

The factors are xx\bold{x} \cdot \bold {x}

Continue factoring:

x28x+15=0(x+__)(x+__)=0\begin{align*} x^2-8x+15 &= 0\\ (\bold{x}+\_\_)(\bold {x}+\_\_)&=0 \end{align*}

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