Given R a set of integers, F1(X1, X2) a linear form and F2(X1, X2) an irreducible quadratic form, we study in this work the cardinality # 1 n1, n2 x : F1(n1, n2) ∈ R and P + (F2(n1, n2)) y where P + (n) denotes the greatest prime factor of an integer n. In particular, we give an asymptotic formula for the number of pairs of integers (n1, n2) in the square [1, x] 2 such that F1(n1, n2) and F2(n1, n2) are both y-friable in the range exp log x (log log log x) 1+ε log log x y x 2 .