How is score calculated in this website?
What is the value of x in this equation?
\(-5x^2 + 25x + 3 = 3x^2 + 14x - 42\)
Simplify as
8x^2 - 11x - 45 = 0
Quadratic Formula
x = [ 11 ± sqrt [ 11^2 - 4 (8) (-45) ] ] / [2 * 8 ] =
[ 11 ± sqrt [ 121 + 1440 ] ] / [16 ] =
[ 11± sqrt [ 1561 ] ] / 16
