exam Maths Puzzle Numerical Ability

solve x squared + 2x-8=-4 and x squared+2x-10=0

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exam Other Question

sketch a curve of the design of a car, label four points and find the cubic function that fits the points. Use the equation y=ax^3+bx^2+cx+d solve for a,b,c and d using a 4x4 inver Find the area under the normal distribution curve to the right of z= -3.24

Please help,

Ellen