x²+7²=9²x²+49=81
x²=32
x=4√2
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x²+7²=9²
x²+49=81
x²=32
x=4√2
x²+49=81
x=√32
x=√16*2
x=4√2
liczę na naj ;D
x²+49=81
x²=81-49
x²=32
x=√32= 4√2