How do you simplify #(x + 3)(x - 4)(x - 5)#?
1 Answer
Apr 3, 2017
Explanation:
To expand a product of factors in the form.
#(x+a)(x+b)(x+c)#
#=x^3+(a+b+c)x^2+(ab+bc+ac)x+abc#
#"here " a=3,b=-4" and " c=-5#
#rArr(x+3)(x-4)(x-5)#
#=x^3+(3-4-5)x^2+(-12+20-15)x+60#
#=x^3-6x^2-7x+60#
