Question

Efectuati calculele: ) a) (15 -2)(15+2) - 12-13.127 33 b) (3/2-263) (V18+ V12):(175 -27) o) [(12-15) - (213 - 15) }(0+246 ) + 12. 1) (1+22+55)(1-12+25)-(-2-15)(-12-15) ​

Answer 1

Răspuns:

Explicație pas cu pas:

a)(5-4)- √(4-4)= 1-1=0

b) (3√2-2√3)(3√2+2√3):(5√3-3√3)= (18-12):2√3= 6:2√3= 3:√3= 3√3:3= √3

c)[2-2√6+3- (8-4√6+3)]·2(3+√6)+12=  (5-2√6-11+4√6)2(3+√6)+12 =(2√6-6)·2(3+√6)+12 = 4·(√6-3)(√6+3)+12= 4(6-9)+12= -12+12=0

d) 1-[√(2+√3)]²-(1-²[√(2-√3)]²)= 1-(2+√3) -1 +2-√3= -2-√3+2-√3= -2√3