Factor x^2+2x+48
Problem
Solution
Identify the coefficients of the quadratic expression in the form
a*x2+b*x+c wherea=1 b=2 andc=48 Search for two integers that multiply to
c=48 and add tob=2 List the factor pairs of 48:
(1,48) (2,24) (3,16) (4,12) and(6,8) Check the sums of these pairs:
1+48=49 2+24=26 3+16=19 4+12=16 and6+8=14 Determine if the expression is factorable over the integers. Since no pair of integers sums to 2, the quadratic cannot be factored into the form
(x+p)*(x+q) using rational numbers.Conclude that the expression is irreducible over the integers, also known as a prime polynomial.
Final Answer
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