q11 a part ASAPPPPPPPPPPPPPPPPPPPPPPP
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=>8x^2 - 22x - 21 = 0
=>8x^2 + 6x - 28x - 21 = 0
=>2x(4x+3) - 7(4x+3) = 0
=>(2x-7)(4x+3) = 0
Now,
=>2x - 7 = 0
=>x = 7/2
OR
=>4x+3 = 0
=>x = (-4/3)
=>8x^2 + 6x - 28x - 21 = 0
=>2x(4x+3) - 7(4x+3) = 0
=>(2x-7)(4x+3) = 0
Now,
=>2x - 7 = 0
=>x = 7/2
OR
=>4x+3 = 0
=>x = (-4/3)
nickkaushiknick:
Please check second value of x . It should be -3/4
Answered by
1
Answer:
(2x - 7) (4x + 3) and x = 7/2 and x = -3/4
Step-by-step explanation:
8x² - ( 28 - 6)x - 21 = 0
8x² - 28x + 6x - 21 = 0
4x ( 2x - 7) + 3 ( 2x - 7) = 0
( 2x - 7 ) (4x + 3) =0
2x - 7 = 0 4x + 3 = 0
x = 7/2 x = -3/4
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