If the coefficients of x2 and x3 are both zero, in the expansion of th – McqOptions

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1.	If the coefficients of x2 and x3 are both zero, in the expansion of the expression (1 + ax + bx2)(1 – 3x)15 in powers of x, then the ordered pair (a, b) is equal to:
A.	(28, 861)
B.	(-54, 315)
C.	(28, 315)
D.	(-21, 714)
Answer» D. (-21, 714)

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