Question

6 Factorise
x2 + 6x -7

Answer 1

(x+7)(x-1)

Explanation:

x^2 + 6x -7

so here we need two number that give 7 when multiplied and 6 when subtracted

7 and 1 are the numbers because

7*1=7 and ,

7-1=6 so,

x^2 + (7-1)x -7

x^2 +7x -x -7

take common from first two terms and from third and fourth term

x(x+7)-1(x+7)

take (x+7) as common

(x+7)(x*1 -1*1)

(x+7)(x-1)

Answer 2

The answer should be (x-7) (x+1)