Question

-15x²+7x+23=0 i just need the answer of it even it's not correct charr cge na loves​

Answer 1

Use the quadratic formula where -15 = a, 7 = b, 23 = c:
`(-b +- √(b^2 - 4ac))/(2a)`

Plug in the values:
`(-7 +- √(7^2 - 4(-15)(23)))/(2(-15))`

And get:
`(-7 +- √(49 +1380))/(-30)`

Which simplifies to:
`(-7 +- √(1429))/(-30) = (-7 + 37.8021163)/-30 OR (-7 - 37.8021163)/-30 = 30.8021163/30 OR -44.8021163/30`

Those are approximately 1 and -1.5