Va roog , ajutati-ma !

a) (2a+3b) la puterea 2
b)(2xla puterea 2 +1)la puterea 2
c) (6xla puterea3 y la puterea 2 +5x la puterea 2 y) la puterea 2
d) (1,2xla puterea 2 y + 0,5 xla puterea 3 yla puterea 2 ) la puterea 2
e) (3x-2y) la puterea 2
f) (5ala puterea 2 - 2ab ) la puterea 2

1

Răspunsuri

2014-10-05T19:55:04+03:00
A) (2a+3b)²=4a²+6ab+9b² 
b)(2x² +1)²=4x^4+4x²+1
c) (6x³ y² +5x²y)²=36x^6y^4+60x^5y^3+25x^4y^2
d) (1,2x^2 y + 0,5 x^3 y^2 )² =1,44x^4y²+1,2x^5y^3+0,25x^6y^4
e) (3x-2y)²=9x²-12xy+4y²
f) (5a² - 2ab )²=25a^4-20a³b+4a²b²