Asked by Purple Haze
Megan wants to find the minimum value of the function y = x^2 - 10x + 3. She begins to convert the equation into vertex form by completing the square. Megan stops at the step below.
y = (x + a)^2 + 3 + b
what number should Megan use to replace the a in this equation?
A. 25
B. -10
C. 100
D. -5
y = (x + a)^2 + 3 + b
what number should Megan use to replace the a in this equation?
A. 25
B. -10
C. 100
D. -5
Answers
Answered by
oobleck
well, x^2-10x+25 = (x-5)^2
so I'd pick a = -5
(and b = -25)
so I'd pick a = -5
(and b = -25)
Answered by
Purple Haze
So it is -25?
Answered by
oobleck
NO. Read the question, and what I wrote.
Answered by
Anonymous
oobleck said -5
the-25 is b
the-25 is b
Answered by
Anonymous
check
y = (x-5)^2 + 3 -25 = x^2 - 10x + 25+ 3 - 25
= x^2 - 10 x +3
y = (x-5)^2 + 3 -25 = x^2 - 10x + 25+ 3 - 25
= x^2 - 10 x +3
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