Hot Student Stories
top-5-grammar-and-spelling-checkers-to-rock-in-2019

What is the axis of symmetry for f(x)=-2x^2+20x-42

Kristi Hammond

in Mathematics

follow
followin
1 answer
4 views

1 answer


William Cain on February 4, 2018

F(x) = -2x2 + 20x - 42This is an expression quadratic.For a general expression ax2 + bx + c, the axis of symmetry x = -b/2aComparing -2x2 + 20x - 42 through ax2 + bx + c, a = -2, b = 20, c= -42Axis of symmetry x = -b/2ax = -20 / (2 * -2) = -20/-4 = 5Therefore axis of symmetry is x = 5.


Add you answer