Answered

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5.Below a student solved a quadratic equation by
completing the square. Where was their first
mistake?
A Step 1
B Step 3
Step 4
D Step 5
Problem: y=(2x²-12x)-7
Step 1:
y + 7 = 2x² - 12x
Step 2:
y + 7 = 2(x² - 6x)
Step 3:
y+7+9= 2(x² - 6x +9)
Step 4:
y + 16 = 2(x-3)²
Step 5:
y = 2(x-3)²-16

Sagot :

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