Question

√28 x ( √20- √80 + √500 - √45) - √20 x (√567 - √63 + √448- √112)=
rog un raspuns, multumesc

Answer 1

Răspuns

Explicație pas cu pas:

√28 x ( √20- √80 + √500 - √45) - √20 x (√567 - √63 + √448- √112)=

√(4×7) × (√(4×5) -√(16×5) + √(100×5) - √(9×5) ) - √(4×5) × (√(81×7)  - √(9×7)+ √(64×7) - √(16×7) ) =

2√7 × ( 2√5 - 4√5 + 10√5 - 3√5) - 2√5 × ( 9√7 - 3√7 + 8√7 - 4√7) =

2√7 × 5√5 - 2√5 × 10√7 =

10√35 - 20√35 =

- 10√35