Answer:
step by step below
Step-by-step explanation:
14. y = x²+4x+1
y=x+1
x+1 = x²+4x+1
x²+3x=0 x(X+3)=0
x=0 or x=-3
18. y=x²-3x-20
y=-x-5
-x-5 = x²-3x-20 x²-2x-15 = 0 (x-5)(x+3) = 0
x=5 or x=-3
20. y=x²+5x+1
y=x²+2x+1
x²+2x+1 = x²+5x+1 3x = 0
x = 0
22. y=-x²-3x-2
y=x²+3x+2
x²+3x+2 = -x²-3x-2 2x²+6x+4 = 0 2(x²+3x+2) = 2 (x+1)(x+2) = 0
x = -1 or x = -2
