Question

Va rog un pic de ajutor aici...
Dau coroana.
15. Calculati :​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

=5√3+3*[ 4√2+4*( 3√3+2√3-6√2)]:20

= 5√3+3*[ 4√2+4*(5√3-6√2)] :20

= 5√3+3*(4√2+20√3-24√2):20

= 5√3+3*(20√3-20√2):20

= 5√3+3*( 20√3:20-20√2:20)

= 5√3+3*( √3-√2)

= 5√3+3√3-3√2

= 8√3-3√2

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b)

=11√7-2*{[ 5√2+( 13√7 + 24√2-9√7)] :4 }

= 11√7-2*{[ 5√2+ ( 4√7+24√2)] :4}

= 11√7-2*{[5√2+(4√7+24√2)]:4}

= 11√7-2*[ (5√2+(4√7:4+24√2:4 )]

= 11√7-2*(5√2+√7+6√2)

= 11√7-2*( 11√2+√7)

= 11√7-22√2-2√7

=9√7-22√2