Simplify 2r+7p-4p²+9q²-4pq-9q²-2r+r²+5p²+11
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1
Answer:
Formula to be used:
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
(3p+5q−2r)
2
=(3p)
2
+(5q)
2
+(−2r)
2
+2(3p)(5q)+2(5q)(−2r)+2(−2r)(3p)
=9p
2
+25q
2
+4r
2
+30pq−20qr−12rp
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