Math, asked by saimamallick1195, 10 months ago

Expand : (a + 2)(a - 1)
2 +98 + 18​

Answers

Answered by Anonymous
5

Hope this helps you. .

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Answered by Anonymous
2

⚡ANSWER ⚡

a = -8 and a = -7

⚡EXPLANATION ⚡

(a+2) (a-1) 2 + 98 + 18

(a^2 - a + 2a - 2) + 116 = 0

2a^2 + 2a + 4 + 116 = 0

2a^2 + 2a + 112 = 0

2 ( a^2 + a + 56 ) = 0

a^2 + a + 56 = 0

Now, by factorisation method =>

a^2 + a + 56 = 0

a^2 + 8a - 7a + 56 = 0

a(a+8) +7(a+8) = 0

(a+8) (a+7) = 0

(a+8) = 0 => a = -8

(a+7) = 0 => a = -7

Hence , a = -8 and -7.

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