Factor by grouping.x3 + 4x2 + 5x + 20
A. (x + 4x)(x2 + 5)
B. (x - 4)(x3 + 5)
C. (x + 4)(x2 - 5)
D. (x + 4)(x2 + 5)
Answer: D
Mathematics
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Factor the perfect square trinomial completely.(x - 6y)2 + 6(x - 6y) + 9
A. (x - 6y + 3)2 B. (x - 6y - 3)2 C. (x + 6y - 3)(x - 6y + 3) D. (x + 6y + 3)2
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Add or subtract as indicated. If terms are not like radicals and cannot be combined, so state. Assume all variables represent nonnegative real numbers.10
- 5
+ 4
A. 10
B. 65
C. -355
D. 355
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Solve the system by substitution. x - 4y = -13-5x - 4y = -7
A. {(-1, 3)} B. {(-3, -1)} C. {(0, 2)} D. ?
Mathematics