Question

b. (7a + 3b) (7a - 8b) + (a - b) (a - 4b) =​

Answer 1

Explicación paso a paso:

(7a + 3b) \times (7a - 8b) + (a - b) \times (a - 4b) =(7a+3b)×(7a−8b)+(a−b)×(a−4b)=

\begin{gathered}(7a + 3b) \times (7a - 8b) = \\ \\ \\ {4a}^{2} - 56ab + 21ab - {24b}^{2} \\ \\ \\ {4a}^{2} - 35ab - {24b}^{2} \end{gathered}

(7a+3b)×(7a−8b)=

4a

2

−56ab+21ab−24b

2

4a

2

−35ab−24b

2

\begin{gathered}(a - b) \times (a - 4b) = \\ \\ \\ {a}^{2} - 4ab - ab + {4b}^{2} \\ \\ \\ {a}^{2} - 5ab + {4b}^{2} \end{gathered}

(a−b)×(a−4b)=

a

2

−4ab−ab+4b

2

a

2

−5ab+4b

2

\begin{gathered} {4a}^{2} - 35ab - {24b}^{2} + {a}^{2} - 5ab + {4b}^{2} = \\ \\ \\ {5a}^{2} - 40ab - {20b}^{2} \end{gathered}

4a

2

−35ab−24b

2

+a

2

−5ab+4b

2

=

5a

2

−40ab−20b

2

espero haberte ayudado y me sigues y me das coronita gracias