b^2 + 8b + 7 factors to (b + 7)(b + 1)
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(8b + 7)(7b + 9)
7(3) + 8(4) x 2 21 + 32 x 2 43 x 2 86 The final answer is 86.
okay well the answer to that is 91 got it (PS. you should know it!) :) peace!
58.
The answer is 380, I hope. :P