4x^2 + 2x = -9
4x^2 + 2x + 9 = 0
remember that the form of quadratic is ax^2 + bx + c = 0
so
a = 4
b = 2
c = 9
Answer:
D
Step-by-step explanation:
(I solved in the picture, firstly look at there)
after completing the square and factoring :



Hope this helps ^-^
Answer:
91
Step-by-step explanation:
155-16s²
155- 16x2²
155- 16x4
155-64
91
7.22 is 7.2242 rounded to the neartest hundreth
Answer:
x = 
Step-by-step explanation:
Given
z = xy ( isolate x by dividing both sides by y )
= x