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What’s the positive solution of x^2-36=5x

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Answer:

9

Explanation:

To begin, move the 5x to the other side, leaving a zero in its place. That leaves you with x^2-5x-36=0.

Next, find the factors of 36. Some include, 6 and 6, and 9 and 4.

We are looking for factors of 36 that add to negative 5. That would be 9 and 4, if the 9 was negative.

This leaves you with two binomials, (x-9)(x+4)=0.

Then you put each binomial equal to zero on its own.

x-9=0, x+4=0

when you solve those you get that x= 9,-4

The only positive solution is 9.

User Mark Wright
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