Rules of exponents and the distributive property apply.
(x+y)² = (x+y)·(x+y) . . . . . meaning of exponent of 2
= x·(x+y) +y·(x+y) . . . . . . . distributive property
= x·x +x·y +y·x +y·y . . . . . distributive property
= x² +x·y +x·y +y² . . . . . . meaning of exponent of 2, commutative property of multiplication
= x² +(1+1)·x·y +y² . . . . . . distributive property
= x²+2xy+y² . . . . . . . . . the desired form
Thus
(x+y)² = x²+2xy+y²
Answer:
Step-by-step explanation:
1.cos
2.sin
3.cos
4.tan
5.sin
6.tan
Answer:
12.2
Step-by-step explanation:
use the Pythagorean theorem to determine the diagonal
9.9^2 + 7.2^2 = d^2
d = 12.2
X\times 2 bc it is correct I think I’m not sure but yeah
Answer:
y = - 1/3 +2
Step-by-step explanation:
✯Hello✯
↪ first we need to rearrange this so the answer is equal to Y
↪ -3x on both sides
↪ 9y =-3x+18
↪ then divide by 9 to get y on its own
↪ Then we can simplify the answer -3x+18/9 further so the 2nd option is the answer
❤Gianna❤
