exam Maths Puzzle Numerical Ability

i'm having a problems trying to factor out polynomials and polynomials with binomails and trinomails i have four that i can not figue out can you please help me. the first one is 3

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exam Other Question

The Heffelfinger Law Office, Inc. borrowed $2,400 from a local finance company for 4 months. If the finance company discounted the note at 8%, the maturity value of the loan was write the equation of the line L. satisfying each of the following sets of geometric conditions. L passes through (5,6) and is perpendicular to 3x-5y=15

L has y-intercept(0,-3) and is paralell to -3x+5y=-15