[tex]2(x-3)(x+5) \leq (3-x)^{2}\\\\2(x^{2}+5x-3x-15) \leq 9-6x+x^{2}\\\\2(x^{2}+2x-15)\leq 9-6x+x^{2}\\\\2x^{2}+4x-30 \leq 9 - 6x + x^{2}\\\\2x^{2}-x^{2}+4x+6x-30-9 \leq 0\\\\x^{2}+10x - 39 \leq 0\\\\M. \ zerowe\\\\\Delta = 10^{2}-4\cdot1\cdot(-39) =100 + 156 = 256\\\\\sqrt{\Delta} = \sqrt{256} = 16[/tex]
[tex]x_1 = \frac{-10-16}{2} =\frac{-26}{2}= -13\\\\x_2 = \frac{-10+16}{2} = \frac{6}{2} = 3\\\\a > 0\\\\x \in \ <-13;3>[/tex]
