Question

find the zero of polynomial 2 x square + 7 x minus 4 is ​

Answer 1

Answer:

2x²+7x-4 = 0

=> 2x² +8x -x -4 =0

=> 2x (x+4) -1 (x+4) = 0

=> (2x-1) (x+4) =0

=> (2x-1) =0 and (x+4) =0

=> x = 1/2 and -4

Answer 2

Answer:

Givenequation:2x

2

+7x−4

2x^2+7x-4=02x

2

+7x−4=0

2x^2+8x-x-4=02x

2

+8x−x−4=0

2x(x+4)-(x+4)=02x(x+4)−(x+4)=0

(2x-1)(x+4)=0(2x−1)(x+4)=0

(2x-1)=0\:or\:(x-4)=0(2x−1)=0or(x−4)=0

x=\frac{1}{2}\:or\:x=-4x=

2

1

orx=−4