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tính cách hợp lí ( nếu có thể )
giúp mình vs ạ
\(\dfrac{5}{7}\).\(\dfrac{-3}{11}\)-\(\dfrac{5}{7}\).\(\dfrac{8}{11}\)+1\(\dfrac{5}{7}\)
= \(\dfrac{5}{7}\).(\(\dfrac{-3}{11}\) - \(\dfrac{8}{11}\)) + 1\(\dfrac{5}{7}\)
= \(\dfrac{5}{7}\). -1 + 1\(\dfrac{5}{7}\)
= \(\dfrac{-5}{7}\) +1\(\dfrac{5}{7}\)
= -1
\(\dfrac{5}{7}.-\dfrac{3}{11}-\dfrac{5}{7}.\dfrac{8}{11}+1\dfrac{5}{7}\)
\(=\dfrac{5}{7}.\left(\dfrac{3}{11}-\dfrac{8}{11}\right)+1\dfrac{5}{7}\)
\(=\dfrac{5}{7}.\left(-1\right)+1\dfrac{5}{7}\)
\(=1\)
\(\dfrac{5}{7}\).\(\dfrac{-3}{11}\)-\(\dfrac{5}{7}\).\(\dfrac{8}{11}\)+1\(\dfrac{5}{7}\)
= \(\dfrac{5}{7}\).(\(\dfrac{-3}{11}\) - \(\dfrac{8}{11}\)) + 1\(\dfrac{5}{7}\)
= \(\dfrac{5}{7}\). -1 + 1\(\dfrac{5}{7}\)
= \(\dfrac{-5}{7}\) +1\(\dfrac{5}{7}\)
= -1
\(\dfrac{5}{7}.-\dfrac{3}{11}-\dfrac{5}{7}.\dfrac{8}{11}+1\dfrac{5}{7}\)
\(=\dfrac{5}{7}.\left(\dfrac{3}{11}-\dfrac{8}{11}\right)+1\dfrac{5}{7}\)
\(=\dfrac{5}{7}.\left(-1\right)+1\dfrac{5}{7}\)
\(=1\)