Factorise :
a2 - 5a + 6
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= a2 + (- 2 - 3)a + 6
= a2 + - 2a - 3a + 6
= (a2 - 2a) - (3a + 6)
= a(a - 2) - 3(a - 2)
= (a - 2)(a - 3)
Hence, a2 - 5a + 6 = (a - 2)(a - 3)
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3 Likes
60 + 11x - x2 is equal to :
(4 + x) (15 - x)
(4 - x) (15 - x)
(4 - x) (15 + x)
(4 + x) (15 + x)
a2 + 5a + 6
a2 + 5a - 6
x2 + 5xy + 4y2