a2+9a+20 = (a+4)(a+5) when factored
9a +8 -2a -3 -5a = 2a +5
a is equal to 1.
4a2 - 9a + 5 = 4a2 - 4a -5a + 5 = 4a(a - 1) - 5(a - 1) = (4a - 5)(a - 1)
That factors to (x + 5)(x + 4)
12a + 6b + 9a + 14b =(12a + 9a) + (6b + 14b) =21a + 20b
(9a + 2)(9a + 2)
2a+5a+9a = 16a
9a + 7b *remember to look and understand the letters!*
9a +8 -2a -3 -5a = 2a +5
9a+21 3(3a+7)
The simplified expression is -9a -9b.