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Hey free 100 points :) (not really) please help!

Complete the square in the quadratic function f given by
f(x) = 2x2 - 6x + 4

1 Answer

6 votes

Answer: x = 2, 1

Step-by-step explanation:2x^2 - 6x + 4 = 0

Firstly, simplify. Divide by 2 to get

2(x^2-3x+2) = 0

Move the constant to the other side.

2(x^2-3x) = -2

Divide the x term by 2 and square it

-3/2^2 = 9/4

Add this result to both sides.

2(x^2-3x+9/4) = 1/4.
Put the perfect sq on both sides
2(x-3/2)^2=1/4
Then solve the equation:

take the sqrt of both sides and isolate x for each solution

x-3/2= +/-1/2
x = 3/2 + 1/2
x= 3/2-1/2
x= 2, 1

User MarcL
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