Answer:
C
Step-by-step explanation:
9x² - 4
can be factored as a difference of squares , that is
(U + V)(U - V)
9x² - 4
= (3x)² - (2y³)²
with U = 2x and V = 2y³
Answer:
52%
Step-by-step explanation:
First, find the difference between this year's sales and the previous'. 1500-990=510.
Now we can divide 990 by 510 to find the percent increase. 510/990=0.515151515152, or 52%.
Answer:
4√7
Step-by-step explanation:
5√7 + √7 - 2√7
Taking out common term, √7.
= √7 ( 5 + 1 - 2)
Simplify the terms in the bracket.
= √7 (4)
= 4 √7