" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
4x+4 =80
4x=80-4
4x=76
x=19
primero resolvemos el producto notable,(x+2)² de la forma (a+b)²
que es a²+2ab+b².......en nuestro caso seria x²+2(x)(2)+2²..........x²+4x+4
entonces
(x+2)²-x²=80
x²+4x+4-x²=80
x²-x²+4x+4=80
4x+4=80
4x=80-4
4x=76
x=76/4
x=19