7+10(2x-3x)-8(2x-3x)^2
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7 + 10 ( 2x - 3x ) - 8 ( 2x - 3x ) ^2
= 7 - 10x - 8 x ^2 =0
- ( 8x^2 + 10x - 7 ) =0
8x^2 + 10x - 7 = 0
8x^2 + 14x - 4x - 7 = 0
4x ( 2x - 1 ) + 7 ( 2x - 1 ) = 0
( 2x - 1 ) (4x + 7 ) = 0
x = 1 / 2 , -7 / 4
= 7 - 10x - 8 x ^2 =0
- ( 8x^2 + 10x - 7 ) =0
8x^2 + 10x - 7 = 0
8x^2 + 14x - 4x - 7 = 0
4x ( 2x - 1 ) + 7 ( 2x - 1 ) = 0
( 2x - 1 ) (4x + 7 ) = 0
x = 1 / 2 , -7 / 4
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