What is 3x^2 + 10x + 8?
#3x^2 + 10x + 8#
1 Answer
Apr 26, 2018
Explanation:
#"assuming you require factorisation of the quadratic"#
#"using the a-c method of factoring"#
#"which sum to + 10 are + 6 and + 4"#
#"split the middle term using these factors"#
#rArr3x^2+6x+4x+8larrcolor(blue)"factor by grouping"#
#=color(red)(3x)(x+2)color(red)(+4)(x+2)#
#"take out the "color(blue)"common factor "(x+2)#
#=(x+2)(color(red)(3x+4))#
#rArr3x^2+10x+8=(x+2)(3x+4)#