exam Maths Puzzle Numerical Ability

IS the following true or false and why?

(2 -1 3 * (4 (3
6 2 5) 2 =-3 1)
5)

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exam Other Question

How do I factor 12x^2+43x+35? Could I get some help on these two please?

"Factor the quadratic expression completely, and find the roots of the expression"

a. 135x^2 - 222X + 91

b. 6x^2 - 42x + 72

Thank you very much!