Jika x10=2 dan y10=7−2 Maka hasil dari xy adalah ....

Pertanyaan

Jika $\style{font-size:14px}{\frac{10}x=\sqrt2}$ dan $\style{font-size:14px}{\frac{10}y=\sqrt7-\sqrt2}$

Maka hasil dari xy adalah ....

$begin mathsize 14px style fraction numerator open parentheses square root of 14 minus 2 close parentheses over denominator 100 end fraction end style$
$begin mathsize 14px style fraction numerator open parentheses square root of 14 plus 2 close parentheses over denominator 10 end fraction end style$

N. Ayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Padang

Jawaban terverifikasi

Pembahasan

$size 14px 10 over size 14px x size 14px equals square root of size 14px 2 fraction numerator size 14px 10 over denominator square root of size 14px 2 end fraction size 14px equals size 14px x fraction numerator size 14px 10 over denominator square root of size 14px 2 end fraction times fraction numerator square root of size 14px 2 over denominator square root of size 14px 2 end fraction size 14px equals size 14px x fraction numerator size 14px 10 square root of size 14px 2 over denominator size 14px 2 end fraction size 14px equals size 14px x size 14px x size 14px equals size 14px 5 square root of size 14px 2$

dan

$size 14px 10 over size 14px y size 14px equals square root of size 14px 7 size 14px minus square root of size 14px 2 fraction numerator size 14px 10 over denominator square root of size 14px 7 size 14px minus square root of size 14px 2 end fraction size 14px equals size 14px y size 14px y size 14px equals fraction numerator size 14px 10 over denominator square root of size 14px 7 size 14px minus square root of size 14px 2 end fraction size 14px times fraction numerator square root of size 14px 7 size 14px plus square root of size 14px 2 over denominator square root of size 14px 7 size 14px plus square root of size 14px 2 end fraction size 14px y size 14px equals fraction numerator size 14px 10 open parentheses square root of size 14px 7 size 14px plus square root of size 14px 2 close parentheses over denominator size 14px 7 size 14px minus size 14px 2 end fraction size 14px y size 14px equals fraction numerator size 14px 10 open parentheses square root of size 14px 7 size 14px plus square root of size 14px 2 close parentheses over denominator size 14px 5 end fraction size 14px y size 14px equals size 14px 2 open parentheses square root of size 14px 7 size 14px plus square root of size 14px 2 close parentheses$

Maka