1.

249y? - o

Answer»

y²-49/64y²=7²/8²so y=7/8

y² - 49÷64

y²= 49÷64

y=7÷8

y^2 - 49/64 = y^2 - (7/8)^2= (y + 7/8) (y - 7/8)



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