3. Factor. 9x2 + 15x (Points : 1) x(3x + 5) 3x(3x + 5) 9x(x + 5) 3x2(3x + 5) Question 4. 4. Factor. 20mn − 30m (Points : 1) 2m − 3 10m(2n − 3) 10mn(2m + 3n) 10n(2m − 3) Question 5. 5. Factor. 8x2y2 − 4x2y − 12xy (Points : 1) 4(2xy − 4x2y − 12xy) 4(8x2y2 − x − 12xy) 4x2y2(2xy − xy −3) 4xy(2xy − x − 3)
It seems that some the work is already here, but I'd be glad to!! So for #3 which is 9x^2+15x, we can factor out both a 3 and an x (3x) so we know that 3x * 3x =9x^2 and 3x * 5 = 15x so once we take the 3x out of the equation, we are left with 3x(3x+5) and that's as far as you can factor. For #4, we see that the common factor is 10m because 10m * 2n = 20mn and 10m * 3 = 30m so once we take 10m out of the original, it becomes 10m(2n-3) For #5, this one the common factor is 4xy because 4xy * 2xy=8x^2y^2 and 4xy*x= 4x^2y and 4xy*3=12xy so once we take the 4xy out of the equation, it becomes 4xy(2xy-x-3) Hope this helps!