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Factor completely.

3x^(2)+33 x+90=

Factor completely.\newline3x2+33x+90=3x^{2}+33x+90=

Full solution

Q. Factor completely.\newline3x2+33x+90=3x^{2}+33x+90=
  1. Identify Quadratic Trinomial: Identify the quadratic trinomial and its coefficients.\newlineThe given quadratic trinomial is 3x2+33x+903x^2 + 33x + 90, where the coefficients are a=3a = 3, b=33b = 33, and c=90c = 90.
  2. Find Multiplying Numbers: Look for two numbers that multiply to acac (a×ca \times c) and add up to bb. We need to find two numbers that multiply to 3×90=2703 \times 90 = 270 and add up to 3333.
  3. Determine Two Numbers: Find the two numbers.\newlineThe two numbers that multiply to 270270 and add up to 3333 are 1515 and 1818.\newlineCheck: 15×18=27015 \times 18 = 270 and 15+18=3315 + 18 = 33.
  4. Rewrite Middle Term: Rewrite the middle term using the two numbers found in Step 33.\newlineRewrite 33x33x as 15x+18x15x + 18x, so the expression becomes 3x2+15x+18x+903x^2 + 15x + 18x + 90.
  5. Factor by Grouping: Factor by grouping. Group the terms into two pairs: 3x2+15x3x^2 + 15x and 18x+9018x + 90. Factor out the greatest common factor from each pair. The greatest common factor of the first pair is 3x3x, and the second pair is 1818. The expression becomes 3x(x+5)+18(x+5)3x(x + 5) + 18(x + 5).
  6. Factor Out Common Factor: Factor out the common binomial factor.\newlineThe common binomial factor is (x+5)(x + 5).\newlineFactor out (x+5)(x + 5) from the expression to get (x+5)(3x+18)(x + 5)(3x + 18).
  7. Simplify Second Factor: Simplify the second factor if possible.\newlineThe second factor 3x+183x + 18 can be simplified by factoring out a 33.\newlineThe expression becomes (x+5)(3(x+6))(x + 5)(3(x + 6)).
  8. Write Final Factored Form: Write the final factored form.\newlineThe final factored form of the expression 3x2+33x+903x^2 + 33x + 90 is (x+5)(3x+18)(x + 5)(3x + 18).