Question

(√5+3) (√5-3)
(√7-√11) (√7+√11)
(√3+2) (2-√3)
VA ROG SA MA AJUTATI DAU CORONITA

Answer 1

(√5+3)(√5-3)=5-9=-4
(√7-√11)(√7+√11)=7-11=-4
(√3+2)(2-√3)=4-3=1

Answer 2

√5 la a doua -3 la a doua=5-9=-4
√7 la a doua - √11 la a doua=7-11=-4
√3 la a doua -2 la a doua=3-4=-1