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What are the x-intercepts of the graph of the function below? y= x^2+3x – 28 A. (7,0) and (4,0) B. (-7,0) and (-4,0) C. (7,0) and (-4,0) D. (-7,0) and (4,0)
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What are the x-intercepts of the graph of the function below?

y= x^2+3x – 28
A. (7,0) and (4,0)
B. (-7,0) and (-4,0)
C. (7,0) and (-4,0)
D. (-7,0) and (4,0)

User Alice Girard
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2 Answers

1 vote
y = x^2 + 3x - 28
y = x^2 + 7x - 4x -28
y = (x^2 + 7x) - (4x - 28)
y = x(x + 7) - 4(x + 7)
y = (x + 7)(x - 4)
y = -7, 4

The answer is D. (-7, 0) and (4, 0)
User Blueether
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5.0k points
3 votes
The answer to your question is D.
User Methodsignature
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6.4k points
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