exam Maths Puzzle Numerical Ability

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# 44
solve: x^2=-6x

#55
Use the ac test to determine if the following trinomial can be factored.
x^2+2x+3.Explain your answer.

#16
State which method should b

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exam Other Question

Derive the identity for tan(a-B)
tan(a-B) = tan[a (-B)].

***** After applying the formula for tan of sum or 2 angels, use the fact that the tan is an odd function The average of two four digit positive integers is found by placing a demimal point between the two numbers. Find the sum of the two four digit numbers.