Q. Rewrite the expression as a product of four linear factors:(12x2−19x)2−5(12x2−19x)−50Answer:
Denote expression as y: Let's denote the expression inside the parentheses as y, so we have:y=12x2−19xNow the given expression can be rewritten as:y2−5y−50We will factor this quadratic expression in terms of y.
Factor quadratic expression: To factor y2−5y−50, we need to find two numbers that multiply to −50 and add up to −5. These numbers are −10 and 5. So we can write the quadratic as: (y−10)(y+5)
Substitute back and simplify: Now we substitute back 12x2−19x for y to get the expression in terms of x: (12x2−19x−10)(12x2−19x+5)
Factor first quadratic expression: Next, we need to factor each quadratic expression. We start with 12x2−19x−10. We look for two numbers that multiply to 12×−10=−120 and add up to −19. These numbers are −20 and 6. So we can write the quadratic as: (4x−10)(3x+1)
Factor second quadratic expression: Now we factor the second quadratic expression, 12x2−19x+5. We look for two numbers that multiply to 12×5=60 and add up to −19. These numbers are −15 and −4. So we can write the quadratic as: (3x−5)(4x−1)
Write original expression as product: Finally, we write the original expression as a product of four linear factors: (4x−10)(3x+1)(3x−5)(4x−1)