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Expand and simplify (x – 9)(x + 2)

x^2 - 7x - 18

Answered by JOSEPH B. Maths tutor
5999 Views

Why do we need the constant of integration?

Consider three simple functions F(x)=2x, G(x)=2x-6, H(x)=2x + π/2. We can differentiate these functions with respect to x to get F’(x)=f(x)=2, G’(x)=g(x)=2, H’(x)=h(x)=2. Clearly the derivatives of these ...

Answered by Panoraia C. Maths tutor
2645 Views

Find the coordinates of the mid-point AB where A (-3,-3) and B (1,3)

X coordinates = (-3+1)/2 = (-2)/2 = -1Y coordinates = (-3+3)/2 = (0) /2 = 0 Coordinates of the midpoint = (x,y) = (-1,0)
If they were struggling to visualise it/to avoid simple mist...

Answered by Edward W. Maths tutor
2505 Views

h^2=25. solve this quadratic equation to find h.

h2 = 25So firstly, we must square root each side of the equation.(square root) h2 = (square root)25.so... h= (square root)25.h=5. or h=-5.

Answered by Helen S. Maths tutor
2772 Views

(2x-5)(3x+2)(x+7) - Expand the brackets.

(6x^2+4x-15x-10)(x+7)(6x^2 -11x-10)(x+7)= 6x^3-11x^2-10x+42x^2-77x-70)=6x^3+31x^2-87x-70

Answered by Gloria A. Maths tutor
4476 Views

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