Asked by mark
Factorise completely:
1)3g-3t+2mg-2mt
2)3x squared + 2x-8
3)3x squared-27
1)3g-3t+2mg-2mt
2)3x squared + 2x-8
3)3x squared-27
Answers
Answered by
Reiny
1. a "grouping" question
3g-3t+2mg-2mt
= 3(g-t) + 2m(g-t)
You do the last step
2. 3x^2 + 2x-8
= (3x - 4)(? + ?) can you figure out the second bracket?
3. 3x^2 - 27
= 3(x^2 - 9)
= ..... mmhh, looks like a difference of squares
3g-3t+2mg-2mt
= 3(g-t) + 2m(g-t)
You do the last step
2. 3x^2 + 2x-8
= (3x - 4)(? + ?) can you figure out the second bracket?
3. 3x^2 - 27
= 3(x^2 - 9)
= ..... mmhh, looks like a difference of squares
Answered by
Nobody
(G-T) ( 3 + 2m)
(3x+4) (x-2)
3 (x+3) ( x-3)
(3x+4) (x-2)
3 (x+3) ( x-3)
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