a)
x²+2²=2√6²
x²+4=2*6
x²=12-4
x²=8
x=√8=2√2
b)
x²+5²=7²
x²+25=49
x²=49-25
x²=24
x=√24=2√6
c)
x²=3²+3√7²
x²=9+3*7
x²=30
x=√30
d)
x²=2√3²+6²
x²=2*3+36
x²=42
x=√42
f)
x²+2√5²=2√19²
x²+2*5=2*19
x²+10=38
x²=38-10
x²=28
x=√28=2√7
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a)
x²+2²=2√6²
x²+4=2*6
x²=12-4
x²=8
x=√8=2√2
b)
x²+5²=7²
x²+25=49
x²=49-25
x²=24
x=√24=2√6
c)
x²=3²+3√7²
x²=9+3*7
x²=30
x=√30
d)
x²=2√3²+6²
x²=2*3+36
x²=42
x=√42
f)
x²+2√5²=2√19²
x²+2*5=2*19
x²+10=38
x²=38-10
x²=28
x=√28=2√7