Question

please someone help to do the 24 no.​

Answer 1

let (a+b) =x

8+6x+5x²

=-5x²+6x+8

=-5x²+10x-4x+8

=-5x(x+2) -4(x+2)

=(x+2) (-5x-4)

=(a+b+2) (-5(a+b) -4)

=(a+b+2) (-5a-5b-4)

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Answer 2

Answer:

$8 + 6a + 6b - 5 {a}^{2} - 10ab - 5 {b}^{2}$

Step-by-step explanation:

$8 + 6(a + b) - 5 ({a + b)}^{2}$

According to the formula,

${(x + y)}^{2} = {x}^{2} + 2xy + {y}^{2}$

${(x + y)}^{2} = {x}^{2} + 2xy + {y}^{2} \\ = > 8 + 6(a + b) - 5( {a}^{2} + 2ab + {b}^{2} ) \\ = > 8 + 6a + 6b - 5 {a}^{2} - 10ab - 5 {b}^{2}$

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