What value in place of the question mark makes the polynomial below a perfect square trinomial?
9x2 + ? x + 49
A. 126
B. 42
C 63
D. 21

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

Measure of angles 31 (x+4) (3x+9) me

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i