Question

Factorize: x2 + 7x - 18 = 0 .​

Answer 1

Answer:

2x + 7x - 18 = 0

9x - 18 = 0

9x = 0+18

9x = 18

x = 18/9

x = 2

ᴠᴀʟᴜᴇ ᴏғ x = 2

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Answer 2

Answer:

x2+7x-18=0

The digits whose sum are 7 and product is 18 are 9 and -2

So, x2 + (9x-2x) -18 = 0

x(x+9) -2(x+9) = 0

(x+9) (x-2)

x= -9, x= 2

The values or zeroes are -9 and 2

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