How do you multiply #(8x + 9)(8x + 3) #?

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Answer 1 · 2017-09-11T15:31:52

#64x^2 + 96x + 27#

We have,
#y = (8x + 9) (8x + 3)#

#implies y = 8x(8x + 9) +3 (8x + 9)#

#implies y = 64x^2 + 72x + 24x + 27#

Collect like terms

#y = 64x^2 + (72x + 24x) + 27#

#implies y = 64x^2 + 96x + 27#

Therefore,

#(8x + 9) (8x + 3) = 64x^2 + 96x + 27#