Answer
$x=-1, 3.3$
Work Step by Step
$-3x^2+7x=-10$
$-3x^2+7x+10=-10+10$
$-3x^2+7x+10=0$
$y=(-b±\sqrt {b^2-4ac})/2a$
$y=(-7±\sqrt {7^2-4*-3*10})/2*-3$
$y=(-7±\sqrt {49+120})/-6$$
$y=(-7±\sqrt {169})/-6$
$y=(-7+13)/-6$ or $y=(-7-13)/-6$
$y=(-7+13)/-6$
$y=6/-6 = -1$
$y=(-7-13)/-6$
$y=(-20)/-6$
$y=10/3 = 3.3$