exam Maths Puzzle Numerical Ability

If k(r)=7-4r, find k(1+h)-k(1)
___________
h

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exam Other Question
How do you get the number 29 by using the numbers 1,2,3,4 only once each. I need help on page #575 on question #20. I need to solve the roots of each quadratic equation using the factoring method, and place the equation in standard form before factoring:


X^2=10x-24


Thanks for your time. =)