What is expand [3(2y+3b)+7][7(2y+3b)-7] ?

The solution to expand [3(2y+3b)+7][7(2y+3b)-7] is 84y^2+252by+189b^2+56y+84b-49

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expand [3(2y+3b)+7][7(2y+3b)-7]

expand

[3 (2 y + 3 b) + 7] [7 (2 y + 3 b) - 7]

84 y^{2} + 252 b y + 189 b^{2} + 56 y + 84 b - 49

Solution steps

(3 (2 y + 3 b) + 7) (7 (2 y + 3 b) - 7)

Apply FOIL method

(3 (2 y + 3 b) + 7) (7 (2 y + 3 b) - 7) : 84 y^{2} + 252 b y + 189 b^{2} + 56 y + 84 b - 49

= 84 y^{2} + 252 b y + 189 b^{2} + 56 y + 84 b - 49

\frac{7}{3 + 2}

\frac{7}{12} + \frac{5}{9}

2 (x + 1)^{2} + 1

6 n^{2} - 9 n

- (- 10 k + 8.8 m + 10)

What is expand [3(2y+3b)+7][7(2y+3b)-7] ?
The solution to expand [3(2y+3b)+7][7(2y+3b)-7] is 84y^2+252by+189b^2+56y+84b-49