Question

помагите пж срочно пж алгебра

Answer 1

$1)\sqrt{7-10x} \\7-10x\geq 0\\-10x\geq -7\\x\leq 0.7\\\\2)\sqrt{5x+40} \\5x+40\geq 0\\5x\geq -40\\x\geq -8\\\\1)2\sqrt{x} =5\\\sqrt{x} =2.5\\x=6.25\\\\2)\sqrt{-x}= 13\\-x = 169\\x = -169$