Question

$10(2a - b) { }^{2} - 10a + 56$
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Answer 1

Step-by-step explanation:

$\Huge\underline{\underline{\sf ANSWER}} \\ 10 {(2a - b)}^{2} - 10a + 56 \\ 10(4 {a}^{2} + {b}^{2} - 4ab) - 10a + 56 \\ 40 {a}^{2} + 10 {b}^{2} - 40ab - 10a + 56$

Answer 2

Step-by-step explanation:

$10 {(2a - b)}^{2} - 10a + 56 \\ \\ 10(4 {a}^{2} - 4ab + {b}^{2} ) - 10a + 56 \\ \\ 40 {a}^{2} - 40ab + 10{b}^{2} - 10a + 56$