Identify a, b, c: Identify a, b, and c in the quadratic expression 5d2+8d+3 by comparing it with the standard form ax2+bx+c.a=5b=8b0
Find two numbers: Find two numbers that multiply to a∗c (which is 5∗3=15) and add up to b (which is 8).The two numbers that satisfy these conditions are 5 and 3 because:5×3=155+3=8
Rewrite middle term: Rewrite the middle term, 8d, using the two numbers found in the previous step.5d2+8d+3 can be rewritten as:5d2+5d+3d+3
Factor by grouping: Factor by grouping. Group the first two terms together and the last two terms together: 5d2+5d + 3d+3
Factor out common factor: Factor out the greatest common factor from each group: 5d(d+1)+3(d+1)
Final factorization: Since both groups contain the common factor (d+1), factor this out:(5d+3)(d+1)
More problems from Factor quadratics with other leading coefficients