the answer is c i used a algebra calculator
Answer:
See below.
Step-by-step explanation:
It transforms to the Pythagoras theorem.
c^2 = a^2 + b^2 - 2ab cos C
If C = 90, cos C = zero so the last term disappears.
c^2 = a^2 + b^2 - 2ab * 0
c^2 = a^2 + b^2.
Answer:
9
Step-by-step explanation:Replace the variable
x with −
3 in the expression. f
(
−
3
) = (
−
3
)
2 Simplify (−
3
)
2
. Remove parentheses. (
−
3
)
2 Raise −
3 to the power of 2
.
9
Answer:
7x(a+8)
Step-by-step explanation:
