1.

P = -4b^2+6b-9 Q = 7b^2-2b-5 ​P-Q=

Answer»

ANSWER:

P-Q=(-4b^2+6b-9)-(7b^2-2b-5)

=-4b^2-7b^2+6b+2b-9+5

= -11 b^2+8b-4

P-Q= -11 b^2+8b-4


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