Jennifer's teacher has marked this problem as one to recheck, but Jennifer cannot determine what she has done incorrectly. Identify Jennifer's error and write a correct solution.

Eight less than 2 times a number is 40. What is the number?

2x – 8 = 40 (line 1)

2x – 8 – 8 = 40 – 8 (line 2)

2x = 32 (line 3)

2x ÷ 2 = 32 ÷ 2 (line 4)

x = 16 (line 5)

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step-by-step explanation:

i don't see any

step-by-step explanation:

many reason,

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct