exam Maths Puzzle Numerical Ability

Please help solve this equation:
b^2-3b+2

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exam Other Question

Find the vertex and intercepts for the parabola g(x)=x^2+x-6 Sketch the graph While only 19 year old, Carl Friedrich Gauss proved in 1796 that every positive integer is the sum of at the most three triangular numbers.
a) Express each of the numbers 25 to 35