exam Maths Puzzle Numerical Ability

line 1 passes through the points (1,-2) and (-2,-4)
line 2 passes through the points (2,2) and (0,5)
is the prependicular or parallel

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exam Other Question

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 =
Find the following product.
(0.3x + 0.2) (0.3x - 0.2)