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cele incercuite?!?!??@

Cele Incercuite class=

Răspuns :

k)(5√2x+√14)²=
25×2+2×5√2×√14=
50+10√28+14=
64+10√28

i)(4√5x+√3)²=
16×5+2×4√5x×√3+3=
80+8√15x+3=
83+8√15x

j)(√15x-4√3)²=
15x²-2√15x×4√3+16×3=
15x²-8√45+48
sucees