Question

multiply the following and verify the result by taking a =-1 b=2 c=1 (3a+2b+c)(2a²-5ab+b²)
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Answer 1

(3×-1+2×2+1). (2(-1)^2-5×-1×2+2^2)

(-3+4+1). ( 2+10+4)

(-3+5) (16)

(2) (16)

=32