What is simplify-4(1-a)-(5+a)2-(a+1)(a-1)*0.3 ?

The solution to simplify-4(1-a)-(5+a)2-(a+1)(a-1)*0.3 is -0.3a^2+2a-13.7

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simplify-4(1-a)-(5+a)2-(a+1)(a-1)*0.3

simplify

- 4 (1 - a) - (5 + a) 2 - (a + 1) (a - 1) \cdot 0.3

- 0.3 a^{2} + 2 a - 13.7

Solution steps

- 4 (1 - a) - (5 + a) \cdot 2 - (a + 1) (a - 1) \cdot 0.3

= - 4 (1 - a) - 2 (5 + a) - 0.3 (a + 1) (a - 1)

Expand

- 4 (1 - a) : - 4 + 4 a

= - 4 + 4 a - 2 (5 + a) - 0.3 (a + 1) (a - 1)

Expand

- 2 (5 + a) : - 10 - 2 a

= - 4 + 4 a - 10 - 2 a - 0.3 (a + 1) (a - 1)

Expand

- 0.3 (a + 1) (a - 1) : - 0.3 a^{2} + 0.3

= - 4 + 4 a - 10 - 2 a - 0.3 a^{2} + 0.3

Group like terms

= - 0.3 a^{2} + 4 a - 2 a - 4 - 10 + 0.3

Add similar elements:

4 a - 2 a = 2 a

= - 0.3 a^{2} + 2 a - 4 - 10 + 0.3

Add the numbers:

- 4 - 10 + 0.3 = - 13.7

= - 0.3 a^{2} + 2 a - 13.7

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What is simplify-4(1-a)-(5+a)2-(a+1)(a-1)*0.3 ?
The solution to simplify-4(1-a)-(5+a)2-(a+1)(a-1)*0.3 is -0.3a^2+2a-13.7