Question

(5x-2y) . (5x-2y) Resposta??

Answer 1

5.5=25
-2.-2=4
25+4=29
R=29y2

Answer 2

( 5x - 2y )( 5x - 2y )
a^2 + ab2 + b^2
5x^2 + 2.5x( - 2y ) + ( - 2y )^2
25x^2 - 20xy + 4^2
( 25x^2 - 20xy )/y^2 = - 4
( 25x^2 - 20xy )/y^2 = - 4
25x^2/y^2 - 20x/y = - 4
25x/y - 20x/y = - 4
5x = - 4y
5x + 4y
5( 0 - y ) + 4y
- 5y + 4y = - 1y
y = 1

25x^2 - 20x.1 + 4.1 = 0
( 25x^2 - 20x + 4 )/5
8,25x^2 - 4x - 1
( - 4 )^2 - 4.8,25( - 1 )
16 + 33,00
49/7
7/7
1

( 4 + 7 )/2.25
11/50
2,2/10
0,22