1.

Find the missing term: y2 + (-) x + 56 = (y + 7)(y + -)

Answer»

We have (x + a) (x + b) = x2 + (a + b)x + ab

56 = 7 × 8 .

∴ y2 + (7 + 8)x + 56 = (y + 7)(y + 8)



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