Question

calcula m+n, si m²+n²=29 y mn= 10

Answer 1

(m+n)²=m²+2mn+n²
(m+n)²=m²+n²+2(10)
(m+n)²=29+20
m+n=raiz de 49
m+n= 7

Answer 2

(m+n)*2=49 m+n= 7 Espero que te sirva.