Identify Form: Identify the form of the quadratic trinomial.The given expression 7x2+35x+42 is a quadratic trinomial in the form ax2+bx+c.
Find Common Factors: Look for common factors in all three terms.The coefficients 7, 35, and 42 all have a common factor of 7.
Factor Out GCF: Factor out the greatest common factor (GCF) from the expression.The GCF of 7x2, 35x, and 42 is 7. Factoring out 7 gives us 7(x2+5x+6).
Factor Quadratic Expression: Factor the quadratic expression inside the parentheses.The quadratic x2+5x+6 can be factored into (x+2)(x+3), since 2 and 3 are the numbers that multiply to 6 and add up to 5.
Write Final Factored Form: Write the final factored form of the original expression.Combining the GCF with the factored quadratic, we get 7(x+2)(x+3).