Question

2.Calculati:

[(1,5-¾)² + (¾-0,5)²] : [1-0,8(3)] =

¾ inseamna 3 supra 4​

Answer 1

Răspuns:

Explicație pas cu pas:

[(1,5-¾)² + (¾-0,5)²] : [1-0,8(3)] =

= [(15/10 - 3/4)² + (3/4 - 5/10)²] : [1- (83-8)/90] =

= [(²⁾3/2 - 3/4)² + (3/4 - ²⁾1/2)²] : [ ⁹⁰⁾1 -75/90] =

= {[(6-3)/4]² + [(3-2)/4]²} :[(90-75)/90] =

= [(3/4)²+(1/4)²] : (15/90) =

= (9/16 + 1/16) · (90/15) =

= (10/16) ·6 = 60/16⁽⁴ = 15/4 = 3,75