Question

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Answer 1

Объяснение:

2.11

1).

${4}^{ {x}^{2} + 2x - 3} = 1$

${4}^{ {x}^{2} + 2x - 3} = {4}^{0}$

${x}^{2} + 2x - 3 = 0$

х1=-3, х2=1

2).

${3}^{ {x}^{2} - x } = 9 \\ {3}^{ {x}^{2} - x} = {3}^{2}$

${x}^{2} - x = 2 \\ {x}^{2} - x - 2 = 0$

х1=-1, х2=2

3).

${( \frac{1}{5} )}^{ {x}^{2} + 2x} = {( \frac{1}{5}) }^{4 - x}$

${x}^{2} + 2x = 4 - x \\ {x}^{2} + 3x - 4 = 0$

х1=-4, х2=1

4).

${7}^{ {x}^{2}} = 49 \\ {7}^{ {x}^{2} } = {7}^{2}$

${x}^{2} = 2$

х1=-√2, х2=√2

2.12 аналогично