1: in ABC, m∠A measures twice m∠B. if exterior angle at C measures 126°, find m∠A. 2: in abc the measure of the exterior angle at b 100° if m∠A is 4 times larger than m∠C find m∠C.

PLEAS I NEED THAT FOR TODAY PLEAS

(a) x intercepts: -6 and 2

you can obtain these by solving the equation 0=x^2 +4x-12 using your favorite quadratic formula. but it is easy to verify -6 and 2 indeed satisfy this equation.

(b) y intercept: -12

this is obtained by setting x=0: 0^2+4*0-12 = -12

(c) the minimum value is: -16 (this is the vertex)

you can get the vertex by rewriting the equation into the form:

there is no global or local maximum as the function goes to infinity, so only in the limit sense: +infinity.