ANSWER: The standard form is 3x² - 6x-10 = 0, with the value of : A=3 ,B= -6, and C= -10STEP BY STEP:Distribute 3x to each term inside the parenthesis: 3x x-3 x 2 = 10 3x² -6x = 10Subtract 10 from both sides to set the equation to 0:3x² - 6x - 10 = 0