Factorsof (y2 + 4y - 45) a are
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Answer:
( y+9) ( y-5)
Step-by-step explanation:
y² + 4y - 45
Factors of -45 that when added or subtracted the result is 4.
Factors= 1, 3, 5, 9, 15 and 45
-1, -3, -5, -9, -15 and -45.
9 x -5 = -45, 9-5=4
= y² + 9y - 5y - 45 {now we should take common}
= y ( y + 9) - 5( y+ 9) { here it becomes +9 because - and - make +}
= ( y+9) ( y-5)
Hope it was helpful. Please don't hesitate to ask of you have any doubt. Take care
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