CPM Homework Help : CCG Problem 4-84

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Home > CCG > Chapter 4 > Lesson 4.2.3 > Problem 4-84

4-84.

Solve each equation below for the given variable. Show all work and check your answer.

$\sqrt{x}-5=2$
Step 1(a):
Add $5$ to both sides.
$\sqrt{x} = 7$
Step 2(a):
$\sqrt{x}^2 = 7^2$
Answer (a):
$x=49$

$-4(-2-x)=5x+6$
Hint (b):
Distribute before simplifying.

$\frac{5}{x-2}=\frac{3}{2}$
Step (c):
$10=3(x-2)$

$x^2+4x-5=0$
Hint (d):
If this equation does not factor, use the Quadratic Formula to solve.

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