Wykonaj działania.
a)(x-1)(x+1)=
b)(2y+3z)(2y-3z)=
c)(1-√2)(1+√2)=
d)(√5-2)(√5+2)=
e)(√7+√3)(√7-√3)
f)(2√3-1)(2√3+1)=
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a)-1
b)4-9
c)-1
d)1
e)4
f)11
a) x^+x -x-1=x^-1
b) 4y^- 6yz + 6yz-9z^ = 4y^ - 9z^
c) 1+√2 - √2 - √4 = 1-2= -1
d) √25 + 2√5 - 2√5 - 4 = 5-4 = 1
e) √49 - √21 + √21 - √9 = 7-3 = 4
f) 4√9 + 2√3 - 2√3 -1 = 4√9 - 1