exam Maths Puzzle Numerical Ability

please help me solve

factor the trinomial

-6m^2-13m+15

i keep getting
(m+3)(-6m+5) the answer says -(6m-5)(m+3)

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exam Other Question

HELLO,HOW DO YOU CHANGE FROM EXPONENTIAL TO RADICAL FORM AND FROM RADICAL TO EXPONENTIAL. CAN YOU GIVE SOME EXAMPLES? THANKS!!!! My head is pounding. I think I am suppose to see where it crosses. going up is y, I don't know please help confused.

Match one of the following equations with a graph.

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