Question

7
$b)y = 25 {}^{2} - 7 {}^{2} apoi \sqrt{y } \\ c)z = 13 {}^{2} + 2 \times 13 \times 17 {}^{2} apoi \sqrt{z}$
$8 b) \: calculati \: \sqrt{14 {}^{2} } \\ \sqrt{7 {}^{4} } \\ \sqrt{a {}^{2} } \: a \: apartine \: multimi \: n \\ c)folosind \: rezultele \: de la subpunctul a calculati \sqrt{2 {}^{2} } \times 3 {4}^{} \\ \sqrt{2 {}^{2} } \times 3 {}^{4} \times 5 {6}^{} \\ \sqrt{2 {}^{100} } \div 2 {84}^{} \\ \sqrt{2 {6}^{} } \times 5 {}^{2} \\ a)completati \: numere \: naturale \: in \: spatiile \: libere \: pentru \: a \: obtine \: egalitati \\ 2 {?}^{2} \times 3 {4}^{} = (....) {?}^{2} \\ 2 {?}^{2} \times 3 {?}^{4} \times 5 {?}^{6} = (....) {?}^{2} \\ 2 {?}^{100} \div 2 {?}^{84} = (....) {?}^{2} \\ 2 {?}^{6} \times 5 {?}^{2} = (.....) {?}^{2}$
imi trebuie acum
urgent!!!!!!
coroana​

Answer 1

$y = {25}^{2} - {7}^{2} \\ \sqrt{y} = \sqrt{ {25}^{2} - {7}^{2} } = 25 - 7 = 18$

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$z = {13}^{2} + 2 \times 13 \times 17 + {17}^{2} \\ = {13}^{2} + 442 + {17}^{2} \\ \sqrt{z} = \sqrt{ {13}^{2} + 442 + {17}^{2} } \\ = \sqrt{169 + 422 + 289} \\ = \sqrt{900} = 30$

$\sqrt{ {14}^{2} } = 14 \\ \sqrt{ {7}^{4} } = {7}^{2} = 49 \\ \sqrt{ {a}^{2} } = a$

$\sqrt{ {2}^{2} \times {3}^{4} } = 2 \times {3}^{2} = 2 \times 9 = 18$

$\sqrt{ {2}^{2} \times {3}^{4} \times {5}^{6} } = 2 \times {3}^{2} \times {5}^{3} = 2 \times 9 \times 125 =$ 2250