exam Maths Puzzle Numerical Ability

I am confused on this one. Thanks for the help

Solve using the quadratic formula

5x^2+x=3

Thanks

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exam Other Question

Can someone help me with this problem?

Which of the following list of the factors of the number 8:

Is it:
(A) 1 and 8
(B) 2,2, and 2
(C) 1,2, and 8
(D) 1,2,4, and 8

Thanks,
Ashley I need to factor and I do not understand this equation, please help

3a^2(a-b)-6a(a-b)+21(a-b)

1)3(a-b)(a^2-2a+7)
2)(3a-b)(a^2-2a+7)
3)(a-b)(3a^2-6a+21)
4)3(a-b)(a^2-6a+21)