Question #8fc1b
1 Answer
Feb 13, 2018
Explanation:
#"factorise the quadratic using the a-c method"#
#"the factors of + 5 which sum to + 6 are + 5 and + 1"#
#rArr5x^2+5x+x+1=0larrcolor(blue)"split the middle term"#
#rArrcolor(red)(5x)(x+1)color(red)(+1)(x+1)=0#
#rArr(x+1)(color(red)(5x+1))=0#
#"equate each factor to zero and solve for x"#
#x+1=0rArrx=-1#
#5x+1=0rArrx=-1/5#