Question

a^2-4 solve by factorisation class 8

Answer 1

Answer:

a square-4=a whole square- 2 whole square= (a+2) (a-2)

Step-by-step explanation:

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Answer 2

a²-4 = 0

(a)²-(2)² = 0

We know that a²-b² = (a+b) (a-b)

So, a² - 2² = 0

(a+2)(a-2) = 0

a+2 =0, a-2 =0

a=-2, a=2

So,a =+-2

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