1) find the measure of angle c of a triangle abc, if:

m∠a = α, m∠b = 2α

2) in ∆abc the angle bisectors drawn from vertices a and b intersect at point d. find ∠adb if:

m∠c = 130°

answer:      

step-by-step explanation:

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

answer: y=0 if that is what u r looking for