factorise :- 7xsquare-7
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4
7x^2-7= 0
7(x^2-1)= 0
x^2-1 = 0
(x+1)(x-1)= 0
So, x = 1 or - 1
7(x^2-1)= 0
x^2-1 = 0
(x+1)(x-1)= 0
So, x = 1 or - 1
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Answered by
2
7x²-7
=7(x²-1)
=7(x+1) (x-1)
=7(x²-1)
=7(x+1) (x-1)
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