exam Maths Puzzle Numerical Ability

Find the vertex, and the x and y intercepts by completing the following:

f(x) = -x^2 + 6x - 8

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exam Other Question

x-2 x+5
___ * ______
x-5 x-2

I need to multiply this can you show me how to solve
Thank you Find the slope and y intercept of the line represented by each of the following equations.

1.y=-2x+9 2.y=-3x+8 3.3x-y=7 4.2x-y=11