-3(b - 7)
-3*b = -3b
-3*7 = -21
-3b - 21
They are supplementary angles.
Answer:
what problem
Step-by-step explanation:
Answer:
![4x + 5](https://tex.z-dn.net/?f=4x%20%2B%205)
Step-by-step explanation:
![(8 - 2x) - (3 - 6x)](https://tex.z-dn.net/?f=%288%20-%202x%29%20-%20%283%20-%206x%29)
![8 - 2x - 1 \times 3 - (6x)](https://tex.z-dn.net/?f=8%20-%202x%20%20-%201%20%5Ctimes%203%20-%20%286x%29)
![8 - 2x - 3 + 6x](https://tex.z-dn.net/?f=8%20-%202x%20-%203%20%2B%206x)
![- 2x + 5 + 6x](https://tex.z-dn.net/?f=%20-%202x%20%2B%205%20%2B%206x)
![4x + 5](https://tex.z-dn.net/?f=4x%20%2B%205)
<h3>Hope it is helpful....</h3>
<span>2x2 + 20x + 50=2(x^2+10x+25)
10=2*5 and 25=5*5 so we can see that this is a perfect square (x+a)^2=x^2+2a+a^2 where a=5
So
</span>2(x^2+10x+25)= 2(x+5)^2