exam Maths Puzzle Numerical Ability

(Fatoring Trinomials of the type ax squared + bx + c)
Factor each experession.

1. 5x squared - 2x - 7
2. 7n squared + 9n + 2
3. 3c squared - 17c - 6
4. 3x squared + 8x + 4

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exam Other Question

give the definition and an example of each term:
angle
line
point
ray
midpoint
complementary angles
supplementary angles
straight angle
acute angle
obtuse angle
scalene
someone please show me how to solve and check this problem...thank you..

5/y-4-8/y-4=2/y^2-16