SOLUTION: Can you help me factorise these questions:- 1. 8a + 12b = 2. x^2 + 5x = 3. 5xy + 15x^2 = 4. 21x^3 - 14 = 5. 18y^2z - 27yz^2 =

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Can you help me factorise these questions:- 1. 8a + 12b = 2. x^2 + 5x = 3. 5xy + 15x^2 = 4. 21x^3 - 14 = 5. 18y^2z - 27yz^2 =      Log On


   

Question 72108: Can you help me factorise these questions:-
1. 8a + 12b =
2. x^2 + 5x =
3. 5xy + 15x^2 =
4. 21x^3 - 14 =
5. 18y^2z - 27yz^2 =
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factorise:
8a%2B12b+=+4%2A2a%2B4%2A3b Factor the 4
8a%2B12b+=+4%282a%2B3b%29
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x%5E2%2B5x+=+x%2Ax%2B5%2Ax Factor the x
x%5E2%2B5x+=+x%28x%2B5%29
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5xy%2B15x%5E2+=+5%2Ax%2Ay+%2B+5%2A3%2Ax%2Ax Factor 5x
5xy%2B15x%5E2+=+5x%28y%2B3x%29
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21x%5E3-14+=+7%2A3%2Ax%5E3-7%2A2 Factor the 7
7%283x%5E3-2%29
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18y%5E2z-27yz%5E2+=+9yz%2A2%2Ay-9yz%2A3%2Az%29 Factor 9yz
9yz%282y-3z%29