Shenika factored the polynomial completely. What is the value of A?5x3+35x2+6x+42(5x2+A)(x+B)
Answer
A
1
B
5
C
6
D
7
Explanation
Expanding (5x² + A)(x + B) gives 5x³ + (5B + A)x² + Ax + AB. The polynomial has 6x, so A = 6. This also fits the other terms: AB = 42 gives B = 7, and 5B + A = 35.
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