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Iura1234567890
a fost răspuns

Restrîngeti in patrate :
a)29+12√5
b) 89+36√2
c)73-40√3
d)16x²+8xy+y²
e)9+6√2
f) f)25x²+40x+16

Răspuns :

Renatemambouko
a)29+12√5=(2√5)²+2×3×2√5+3²=(2√5+3)²
b) 89+36√2=(2√2)²+2×9×2√2+9²=(2√2+9)²
c)73-40√3=(4√3)²+2×5×4√3+5²=(4√3+5)²
d)16x²+8xy+y² =(4x+y)²
e)9+6√2=(√3)²+2×√3×√6+(√6)²=(√3+√6)²                 
  explicatie    2×√3×√6=2√18=2×3√2=6√2
 f)25x²+40x+16= (5x+4)²







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