Question 378185
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Hi
 x-intercepts (to the nearest tenth) of the equation f(x)=-2x^2+4x+3
0 = -2x^2 + 4x + 3
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-4 +- sqrt( 40 ))/(-4) }}}
{{{x = (-4 +- sqrt( 4*10 ))/(-4) }}}
{{{x = (-4 +- 2*sqrt(10 ))/(-4) }}}
{{{x = 1 +- (-.5sqrt(10))}}}
x = 1 - 1.58 = -.58 = -.6
x = 1 + 1.58 = 2.58  = 2.6
x- Intercepts: Pt(-.6,0) and Pt(2.6,0)
{{{graph( 300, 300,-6,6,-6,6,-2x^2 + 4x + 3
) }}}