Enrhifo
\sqrt{21}+\sqrt{133}-\sqrt{15}-\sqrt{95}\approx 2.495360599
Cwis
Arithmetic
5 problemau tebyg i:
( \sqrt { 7 } - \sqrt { 5 } ) \cdot ( \sqrt { 3 } + \sqrt { 19 } ) =
Rhannu
Copïo i clipfwrdd
\sqrt{7}\sqrt{3}+\sqrt{7}\sqrt{19}-\sqrt{5}\sqrt{3}-\sqrt{5}\sqrt{19}
Cyfrifwch y briodoledd ddosrannol drwy luosi pob \sqrt{7}-\sqrt{5} gan bob \sqrt{3}+\sqrt{19}.
\sqrt{21}+\sqrt{7}\sqrt{19}-\sqrt{5}\sqrt{3}-\sqrt{5}\sqrt{19}
I luosi \sqrt{7} a \sqrt{3}, dylid lluosi'r rhifau dan yr ail isradd.
\sqrt{21}+\sqrt{133}-\sqrt{5}\sqrt{3}-\sqrt{5}\sqrt{19}
I luosi \sqrt{7} a \sqrt{19}, dylid lluosi'r rhifau dan yr ail isradd.
\sqrt{21}+\sqrt{133}-\sqrt{15}-\sqrt{5}\sqrt{19}
I luosi \sqrt{5} a \sqrt{3}, dylid lluosi'r rhifau dan yr ail isradd.
\sqrt{21}+\sqrt{133}-\sqrt{15}-\sqrt{95}
I luosi \sqrt{5} a \sqrt{19}, dylid lluosi'r rhifau dan yr ail isradd.
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