Asked by harry
factorise
1. 3a^2 - 2a - 8
2. 3x^2 + 31 + 10
3. 64y^2 - 49
please help
thankyou
1. 3a^2 - 2a - 8
2. 3x^2 + 31 + 10
3. 64y^2 - 49
please help
thankyou
Answers
Answered by
Damon
well, 6 and 4 differ by 2
so
(3a+4)(a-2)
I need 30 and 1 so
(3x+1)(x+10)
difference of 2 squares
a^2-b^2 = (a-b)(a+b)
here a = 8y and b = 7
so
(3a+4)(a-2)
I need 30 and 1 so
(3x+1)(x+10)
difference of 2 squares
a^2-b^2 = (a-b)(a+b)
here a = 8y and b = 7
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