plz tell me solution for x(2x+7)-3(2x+7)=0
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Answered by
1
x(2x+7)-3(2x+7)=0
2x^2+7x-6x-21=0
2x^2+x-21=0
2x^2+7x-6x-21=0
x(2x+7)-3(2x+7)=0
(x-3)(2x+7)=0
x=3 and 2x=-7
x=-7/2
2x^2+7x-6x-21=0
2x^2+x-21=0
2x^2+7x-6x-21=0
x(2x+7)-3(2x+7)=0
(x-3)(2x+7)=0
x=3 and 2x=-7
x=-7/2
AbdulRahim184:
wrong
Answered by
0
Hi friend!!
» x(2x+7) - 3(2x-7) = 0
Take (2x+7) as common,
» (2x+7) (x-3) = 0
» 2x+7 = 0 => x = -7/2
» x-3 = 0 => x = 3
» x(2x+7) - 3(2x-7) = 0
Take (2x+7) as common,
» (2x+7) (x-3) = 0
» 2x+7 = 0 => x = -7/2
» x-3 = 0 => x = 3
Hi friend , we have to find the value of x, x by formula -b+-square root b^2-4acdivided by 2a
sorry but ur answer id wrong according tu my book
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