The factor x + 1 is a factor of the trinomial expression 5x^2 + 20x + 15
How to determine the factor of the expression?
The expression is given as:
5x^2 + 20x + 15
Factor out 5 from the expression
5(x^2 + 4x + 3)
Expand
5(x^2 + x + 3x + 3)
Factorize the expression
5(x(x + 1) + 3(x + 1))
Factor out x + 1
5(x + 3)(x + 1)
The factors of the above expressions are 5, x + 3 and x + 1
Hence, x + 1 is a factor of the trinomial expression 5x^2 + 20x + 15
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