Question

Efectuați:
a) (2x²-x+1)²=
b)(√2+√3-√5)²=
c) (a+b)⁴=
d) (a-b)⁴=

Answer 1

a) 4$x^{4}$-$x^{2}$+1
b)10+2$\sqrt{6}$-2$\sqrt{5}$-2$\sqrt{10}$
c)$a^{4}$+$b^{4}$+3$a^{2} b^{2}$+2$a^{3}b$+2a$b^{3}$
d)$a^4}$+$b^{4}$+6a^{2}b^{2}-4a^{3}b-4ab^{3}