Oblicz :
(√8+√2)do2= (√32-√2)do2=
(√5+√3)do2=
(√8+2)do2=
(√7+√2)do2=
Proszę o rozpisanie :))
(√8+√2)²=(√8)²+2·√8·√2+(√2)²=8+2√16+2=8+2·4+2=8+8+2=18
(√32-√2)²=(√32)²-2√32·√2+(√2)²=32-2√64+2=32-2·8+2=32-16+2=18
(√5+√3)²=(√5)²+2√5·√3+(√3)²=5+2√15+3=8+2√15
(√8+2)²=(√8)²+2√8·2+2²=8+2√8·2+4=8+4√8+4=12+4√4·√2=12+4·2·√2=12+8√2
(√7+√2)²=(√7)²+2√7·√2+(√2)²=7+2√14+2=9+2√14
a)
b)
c)
d)
e)
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(√8+√2)²=(√8)²+2·√8·√2+(√2)²=8+2√16+2=8+2·4+2=8+8+2=18
(√32-√2)²=(√32)²-2√32·√2+(√2)²=32-2√64+2=32-2·8+2=32-16+2=18
(√5+√3)²=(√5)²+2√5·√3+(√3)²=5+2√15+3=8+2√15
(√8+2)²=(√8)²+2√8·2+2²=8+2√8·2+4=8+4√8+4=12+4√4·√2=12+4·2·√2=12+8√2
(√7+√2)²=(√7)²+2√7·√2+(√2)²=7+2√14+2=9+2√14
a)
b)
c)
d)
e)