exam Maths Puzzle Numerical Ability

P(x)=2x^3-21x^2-2x+25; a=1,b=2

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exam Other Question

write an equation of a line containing the given point and perpendicular to the given line. Write your equation in slope-intercept form.
(1,17); x=4 a principal walks in and said I am 4 times the age of my grandson and my son is 11 years younger than my daughter and my daughter is 30 years older than my grandson .. all of our ages equal 196..how old is the principal????