C. (3x+1)(3x-2) 3x times 3x= 9x^2 and 3x times -1= -3x
2 times 3x= 6x and 2 times -1= -2
9x^2- 3x+6x-2
9x^2+3x-2
Hope I explain this more clearly for you.
Answer:
A = 20% B = 36%
Step-by-step explanation:
35 in total bought
2/10 = who bought model A = 20%
16+9 = 25 => 9/25 who bought model B = 36%
Perimeter means all the way around.....
so:
3.5 + 9 + 3.5 + 9
= 25
Using formula of difference of two squares a^2 -b^2 =(a-b)(a+b) we get
49p^2 -64y^2 = (7p -8y)(7p +8y)
and
1 - 25x^2 = (1 -5x)(1 +5x)
hope helped
Answer:
see explanation
Step-by-step explanation:
note that (sinx)² = sin²x
4sin²x - 2 = 0 ( add 2 to both sides )
4sin²x = 2 ( divide both sides by 4 )
sin²x = 
= 
( take square root of both sides )
sinx = ± 
= ± 
sinx = ( sinx > 0 , then x is in 1st/2nd quadrants )
x = 
, π - = 
sinx = - ( sinx < 0 , then x is in 3rd/4th quadrants )
x = π + = 
, 2π - = 
solutions are
, , , in the interval [ 0, 2π )
