Omg can someone me solve this problem
select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -7x2 + 2x + 6.
a.){–0.79, 1.08}
b.){-7, 2}
c.) {–0.29, –0.86}
d.) {–1.17, 0.33}

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18