Question

Factorise: y² - 7y - 30​

Answer 1

y2-7y-30

y2-10y+3y-30

(y2-10y)+(3y-30)

y(y-10)+3(y-10)

(y-10)+(y+3)

Answer 2

Step-by-step explanation:

y^2-7y-30

y^2-10y+3y-30 =0

y (y-10) + 3 (y-10) = 0

(y+3) (y-10) =0

y+3 = 0 ;. y-10 =0

y = -3. ;. y = 10

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