Question

find zero of 2x square -9x-5

Answer 1

Answer:

2x2-9x-5=0

2x2-10x+x-5=0

2x(x-5)-1(x-5)=0

(2x-1) (x-5) =0

x=1/2 or x=5

Answer 2

Answer:

x = 5

x = -0.5

Step-by-step explanation:

$2x^{2} -9x-5$

Using Quadratic formula ,

x = [-b ± √b² - 4ac] / 2a

x = [-(-9) ± √(-9)² - 4(2)(-5)] / 2(2)

x = [9 ± √81 + 40] / 4

x = [9 ± √121] / 4

x = [9 ± 11] / 4

$x=\frac{9+11}{4} \\\\x=\frac{20}{4} \\\\x=5$

$x=\frac{9-11}{4} \\\\x=\frac{-2}{4} \\\\x=\frac{-1}{2} \\\\x=-0.5$