Expand and simplify (x – 9)(x + 2)

x^2 - 7x - 18

Answered by JOSEPH B. Maths tutor

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Make d the subject of the formula: 3d + dxy = 4


Complete the square of x^2 + 10x -3


( 9x3) + (18 /3)


Simplify the following fraction - Numerator = 2(8-k) + 4(k-1) Denominator = k^2 - 36


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