Solving x2 + bx + c = 0
Mathematics
7th - 9th Grade
CCSS covered
Used 116+ times
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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Factor x2 – 7x + 12.
(x – 6)(x – 2)
(x + 3)(x + 4)
(x – 3)(x – 4)
(x + 6)(x + 2)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Factor x2 – 4x – 32.
(x +16)(x – 2)
(x – 16)(x + 2)
(x + 8)(x – 4)
(x – 8)(x + 4)
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
When factoring quadratic trinomials of the form x2 + bx + c, what is true about m and n if the factored form is (x + m)(x + n)?
Their sum is equal to c, and their product is equal to b.
The sum of b and c is equal to the product of m and n.
Their sum is equal to b, and their product is equal to c.
The product of b and c is equal to the sum of m and n.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suppose the area of a square is x2 – 10x + 25. What is the perimeter of the square? Hint: Factor the above first to find the side lengths.
2x – 10
4x
4x – 20
2x
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve x2 – x – 72 = 0.
x = -8
x = -8 or x = 9
x = 8 or x = -9
x = 9
Tags
CCSS.HSA-REI.B.4B
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve a2 – 12a = -27.
a = 3
a = 9
a = 3 or a = 9
a = -27 or a = -15
Tags
CCSS.HSA-REI.B.4B
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Factor x2 – 4x – 32.
(x – 16)(x + 2)
(x – 8)(x + 4)
(x + 8)(x – 4)
(x +16)(x – 2)
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