Question

Solve using the quadratic equation -4x² + 7x + 5 = 0​

Answer 1

x=-0.544727

x=2.294727

Explanation:

Given quadratic equation to solve:

• -4x²+7x+5=0

To solve, use the quadratic formula

x= -b ± b² - 4ac / 2a

Substitute your values for a, b, & c and solve

x= -7 ± 7² - 4·(-4)·5 / 2·(-4)

x= -7 ± 49 - -80/-8

x= -7 ± 129/-8

Then, reduce the problem

x= -7/-8 ± 129/-8

x=-0.544727

x=2.294727