Question

Split the middle term y^2-16y+63

Answer 1

y² - 16y + 63

= y² - 9y - 7y + 63

Splits of middle terms = -16y = -9y, - 7y

Answer 2

Here is your answer

y²-16y+63=0

y²-9y-7y+63=0

y(y-9)-7(y-9)=0

(y-9)(y-7)=0

y= 9 or 7

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