Math, asked by PravinParmar9736, 1 year ago

simplify: [ sqrt 3 + sqrt 7] / sqrt 27 + sqrt 63 - sqrt 28 - sqrt 48

Answers

Answered by Raj13111
23
[√(3) +√(7)]/√(27) + √(63) - √(28) - √(48)
= [√(3) + √(7) ]/ 3√(3) + 3√(7) - 2√(7) - 4√(3)
= [ √(3) + √(7) ]/ √(7) - √(3)
= [√(3) + √(7)]²/ 4
= 3 + 7 + 2√(3)√(7) / 4
= 10 + 2√(21) / 4
= 5 + √(21) / 2
Answered by Stevi
20

Answer:

Given question is to simplify \frac{\sqrt{3} +\sqrt{7} }{\sqrt{27} +\sqrt{63} -\sqrt{28} -\sqrt{48} }

\frac{\sqrt{3} +\sqrt{7} }{\sqrt{27} +\sqrt{63} -\sqrt{28} -\sqrt{48} } = \frac{\sqrt{3} +\sqrt{7} }{3\sqrt{3} +3\sqrt{7} -2\sqrt{7} -4\sqrt{3} }

                            = \frac{\sqrt{7} +\sqrt{3} }{\sqrt{7} -\sqrt{3} }

                            = \frac{\sqrt{7} +\sqrt{3} }{\sqrt{7} -\sqrt{3} } * \frac{\sqrt{7} +\sqrt{3} }{\sqrt{7} +\sqrt{3} }

                            = \frac{(\sqrt{7} +\sqrt{3})^2 }{(\sqrt{7})^2 -(\sqrt{3})^2 }

                            = \frac{(\sqrt{7} )^2 +2*\sqrt{7} *\sqrt{3} +(\sqrt{3})^2 }{7-3}

                            = \frac{7+2\sqrt{21}+3 }{4}

                            = \frac{10 +2\sqrt{21} }{4}

                            =\frac{2(5+\sqrt{21} )}{4}

                            =\frac{5+\sqrt{21} }{2}

               Hope it helps you^_^

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