Through the point m (2,0), make a straight line L with slope 1, intersect the parabola y * 2 = 4x at points a and B, and find the length of ab

Through the point m (2,0), make a straight line L with slope 1, intersect the parabola y * 2 = 4x at points a and B, and find the length of ab

Through the point m (2,0) as a straight line with slope 1, l is y = X-2 (point oblique) y ^ 2 = 4xx ^ 2-4x + 4 = 4xx ^ 2-8x + 4 = 0, X1 = 4 + 2 √ 3x2 = 4-2 √ 3, then Y1 = 2 + 2 √ 3, Y2 = 2-2 √ 3, AB absolute value = under the root sign (4 + 2 √ 3 - 4 + 2 √ 3) ^ 2 + (2 + 2 √ 3 - 2 + 2 √ 3) ^ 2 = 48 + 48 = 96, so AB = 4 √ 6