Question

Expand (10+y) = (10)² + 20y + y²​

Answer 1

Step-by-step explanation:

10+y=102+20⋅y+y2

10=100

Answer 2

Answer:

10+y=100+2y+ysquare

ysquare +y+90=0

ysquare +10y-9y+90=0

y(y+10)-9(y+10)=0

y=9,-10

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