Question

solve this by formula method 2x(4x-1)=15​

Answer 1

Answer:

x = 3/2 OR -5/4

Step-by-step explanation:

8x^2-2x-15=0

=8x^2+10x-12x-15

=2x(4x+5)-3(4x+5)

=(2x-3)(4x+5)

x = 3/2 OR -5/4

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Answer 2

Answer:

$2x(4x - 1) = 15\\8x^{2} - 2x = 15\\8x^{2} - 2x - 15 = 0\\8x^2 + 10x - 12x - 15 = 0 \\2x(4x + 5) - 3x(4x + 5) = 0\\(2x - 3)(4x + 5) = 0 \\\\x= \frac{3}{2}$

OR

$x= \frac{-5}{4}$

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