Question

$factorise \: 3 x - ( x - 1 ) ^ { 2 } + a x - 2 a - 5r$
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Answer 1

Answer:

5x - x² - 1 + ax - 2a - 5r

Step-by-step explanation:

➺ 3x - (x-1)² + ax - 2a - 5r

Use (a-b)² = a² - 2ab + b²

➺ 3x - (x²-2x+1) + ax - 2a - 5r

Remove the brackets and change signs

➺ 3x - x² + 2x - 1 + ax - 2a - 5r

Collect the like terms

➺ 5x - x² - 1 + ax - 2a - 5r

$\star{\underline{\boxed{\bf 5x - x^2 - 1 + ax - 2a - 5r}}}$

Answer 2

Step-by-step explanation:

5x - x² - 1 + ax - 2a - 5r

Step-by-step explanation:

➺ 3x - (x-1)² + ax - 2a - 5r

Use (a-b)² = a² - 2ab + b²

➺ 3x - (x²-2x+1) + ax - 2a - 5r

Remove the brackets and change signs

➺ 3x - x² + 2x - 1 + ax - 2a - 5r

Collect the like terms

➺ 5x - x² - 1 + ax - 2a - 5r

\star{\underline{\boxed{\bf 5x - x^2 - 1 + ax - 2a - 5r}}}⋆

5x−x

2

−1+ax−2a−5r