Question

Sandy and Tessa each described how they would solve the equation (7x - 2)2 = 9.
(a) Sandy said, “I take the square root on both sides of the equation.”
Show Sandy's method.​

Answer 1

Answer:

correct or what

Step-by-step explanation:

Step by step solution :

STEP

1

:

Equation at the end of step 1

(((x3) - 7x2) + 65x) - 159 = 0

STEP

2

:

Checking for a perfect cube

2.1 x3-7x2+65x-159 is not a perfect cube

Trying to factor by pulling out :

2.2 Factoring: x3-7x2+65x-159

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1: 65x-159

Group 2: x3-7x2

Pull out from each group separately :

Group 1: (65x-159) • (1)

Group 2: (x-7) • (x2)

Bad news !! Factoring by pulling out fails :

The groups have no common factor and can not be added up to form a multiplication.

Polynomial Roots Calculator :