Question

$(3x + 1)^{2} - 100 = 0$
(а+в) (а-в) =0​

Answer 1

(3x+1-10)(3x+1+10)=0
(3x-9)(3x+1+10)
3(x-3)(3x+11)
(x-3)(3x+11)
x-3=0
3x+11=0
x1=11/3
x2=3