Answer:
D
Step-by-step explanation:
x^2+2x-5-(-3x^2-4x+1)
x^2+2x-5+3x^2+4x-1
4x^2+6x-6
Square- 1 1/2
Triangle- 2 1/2
Answer:
15 sin 55 = 12
Step-by-step explanation:
It is a basic trigonometry formula
Answer:
x = –4
Step-by-step explanation:
x = –koef x / (2•koef x²)