Which set of side lengths form a right triangle?
a.7 cm, 8 cm, 10 cm
b.15 m, 20 m, 25 m
c.10 in., 41 in., 40 in.
d.3 ft, 6 ft, 5 ft
i was thinking c but i searched up and it said 91 are obtuse & not right angle so im confused

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.

the two may have that, even a breakdown is probably offered