Question

Комектесіндерші 500 балл беремін пжжж​

Answer 1

Ответ:

$1) {x}^{2} - 49 = 0 \\ {x}^{2} = 49 \\ x = + 7 \\ x = - 7 \\ 2)16 - {a}^{2} = 0 \\ - {a}^{2} = - 16 \\ {a}^{2} = 16 \\ a = 4 \\ a = - 4$

$3) {y}^{2} - 2 \frac{1}{4} = 0 \\ {y}^{2} = 9 \\ y = 3 \\ y = - 3 \\ 4)0.36 - 0.81 {a}^{2} = 0 \\ - 0.81 {a}^{2} = - 0.36 \\ 0.81 {a}^{2} = 0.36 \\ {a}^{2} = \frac{4}{9} \\ a = \frac{2}{3} \\ a = - \frac{2}{3}$

$5)6.25 {x}^{2} - 100 = 0 \\ 6.25 {x}^{2} = 100 \\ {x}^{2} = 16 \\ x = 4 \\ x = - 4 \\ 6)11 \frac{1}{9} - \frac{1}{4} {x}^{2} = 0 \\ - \frac{1}{4} {x}^{2} = - \frac{100}{9} \\ {x}^{2} = \frac{400}{9} \\ x = \frac{20}{3} \\ x = - \frac{20}{3}$