Answer:
4x²+12xy+9y²
(2x+3y)²
=(2x+3y)*(2x+3y)
2x *2x , 2x *3y , 3y* 2x ,3y* 3y
=4x²+12xy+9y²
Answer:
Step-by-step explanation:
<u>Find the sum:</u>
- 1/2n(n+1) + 1/2(n+1)(n+2) =
- 1/2(n² + n) + 1/2(n² + 3n + 2) =
- 1/2(n² + n + n² + 3n + 2) =
- 1/2(2n² + 4n + 2) =
- n² + 2n + 1 =
- (n + 1)²
Proved
Answer:
11.4
Step-by-step explanation:
53.562-42.17=11.392
Let first number =a
Let second number = b
a =b+ 19
:b+b+19=43
2b+19=43
2b=43-19
2b=24
b=24/2
b=12
a=b+19
=12+19
=31
Check:31+12
=43
