What is the difference? X+5 X+ 1
%+2 x2 + 2%
x+44-1
X(X+2)
x2 + 4x+1
X(X+2)
4
-1(x²+x-2)
x2 +6%+1
X(X+2)

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)