What is (8c-d)(c+9d)-5(d-8c) ?

The solution to (8c-d)(c+9d)-5(d-8c) is 8c^2+71cd-9d^2-5d+40c

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simplify (8c-d)(c+9d)-5(d-8c)

simplify

(8 c - d) (c + 9 d) - 5 (d - 8 c)

8 c^{2} + 71 c d - 9 d^{2} - 5 d + 40 c

Solution steps

(8 c - d) (c + 9 d) - 5 (d - 8 c)

Expand

(8 c - d) (c + 9 d) : 8 c^{2} + 71 c d - 9 d^{2}

= 8 c^{2} + 71 c d - 9 d^{2} - 5 (d - 8 c)

Expand

- 5 (d - 8 c) : - 5 d + 40 c

= 8 c^{2} + 71 c d - 9 d^{2} - 5 d + 40 c

(\frac{( 2 z ^{4} )}{( 3 z ^{7} )})^{- 3}

(3 m - 4 n + 2 p)^{2}

arctan (\frac{( 1 + x ^{2} - 1 )}{x})

\frac{( x ^{2} - y ^{2} )}{2 x - 2 y}

(\frac{1 - 1}{n})^{n}

What is (8c-d)(c+9d)-5(d-8c) ?
The solution to (8c-d)(c+9d)-5(d-8c) is 8c^2+71cd-9d^2-5d+40c