book Maths Puzzle Numerical Ability

Find the discriminant and describe the natue of the roots.
3x^2 + 7x - 10 = 0

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book Other Question

please help me solve this problem
_1___
x-4
______ use long division to divide the following polynomials:
1) divide 3x^4-7x^2+2x-10 by x-3
2) divide 6x^4+20x^3+13x^2-5x+2 by 2x^2-1
3) divide 4x+y by 3x-2
4) divide x^3-11 by x^2