Question

2a^2-5a-7 factorise the following
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Answer 1

$2 {a}^{2} - 5a - 7$

$2 {a}^{2} - ( 7 - 2)a - 7$

$2 {a}^{2} - 7a + 2a - 7$

$a(2a - 7) + 1(2a - 7)$

$(2a - 7)(a + 1)$

Answer 2

Step-by-step explanation:

2a²-5a-7

2a²-(7-2)a-7

2a²-7a+2a-7

a(2a-7)+1(2a-7)

(a+1)(2a-7)