How do you evaluate $5 \sqrt{x + 2} + 3 \sqrt{x + 2}$ $5\sqrt { x + 2} + 3\sqrt { x + 2}$ ?

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Answer 1 · 2017-10-08T22:14:10

You can’t evaluate this expression, but you can simplify it to:

$8 \sqrt{x + 2}$ $8sqrt(x+2)$

This answer is found by combining like radicals.

Pretend that $\sqrt{x + 2} = y$ $sqrt(x+2)=y$

Then you have $5 y + 3 y$ $5y+3y$ .

Normally when you see this, you combine the $y$ $y$ ’s to get:

$8 y$ $8y$

Replace $y$ $y$ with $\sqrt{x + 2}$ $sqrt(x+2)$ and you get:

$8 \sqrt{x + 2}$ $8sqrt(x+2)$

How do you evaluate 5√x+2+3√x+25\sqrt { x + 2} + 3\sqrt { x + 2}?