contribute to the end of the open range
Answer:
Use PapaMath
Explanation:
Papa math is an algebra calculator that you can plug in big math problems without having to download. You could if you want but you don't have to. You could even write in Word problems and it would solve it for you and then it would tell you how to do it. It can be copy and pasted. It can also give you a long explanation if you want it. It can give you a video to help you, And it's a really useful page. You should check it out.
Answer: p^2 + 4q^2 + r^2 + 4pq + 4qr + 2pr
Explanation:
We need to expand (p+2q+r)^2
We know that (x+y+z) ^2 = x^2 + y^2 + z^2 + 2xy + 2yz + 2xz
Here x = p,y = 2q and z = r
Therefore (p+2q+r)^2 = (p)^2 + (2q)^2 + (r)^2 + 2(p)(2q) + 2(2q)(r) + 2(p)(r)
= p^2 + 4q^2 + r^2 + 4pq + 4qr + 2pr
