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Change the subject of the formula F=(t^2+4b)/c to b.

b = (Fc-t^2)/4

Answered by Mayez H. • Maths tutor

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Solve x^2 - 9 = 4x + 12

Expand (x-5)(2x-3)

There are 20 balls in a bag. The probability is 0.25 of picking a red ball. If one more red ball is added, what is the new probability of picking a red ball at random?

Write 2x^(2) + 9x + 1 in the from a(x+m)^(2) + n, and hence solve 2x^(2) + 9x + 1= 0, leaving your answer in surd form.

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