Question

For what values of C will the straight line 4x + 6y + c = 0
pass through the point (3, 2)?
. (a) – 12 (b) – 24 (c) 6 (d) 3
3. 3.r? + 5x - 7= 0 lpgtfus facrata 99-
The discriminant of the equation 3x² + 5x - 7 = 0 is
(a) 15 (b) 46 (c) 108 (d) 109​

Answer 1

Answer:

1. If the line passes through (3,2), x = 3, y = 2 is a solution of its equation.

4*3 + 6*2 + c = 0

12 + 12 + c = 0

24 + c = 0

c = -24

2. In 3x² + 5x - 7 = 0, a = 3, b = 5, c = -7

D = b² - 4ac = 5² - 4*3*-7 = 25 - -84 = 25 + 84 = 109