x equals 4
30 x 0
12x - 5(2x - 6) = 30 12 x - 10x + 30 = 30 2x = 0, x = 0 y = -6
3
Does this mean w^2 + w -30 = 0 ? If so, w = 5 or -6
x equals 4
30 x 0
The numbers are: 30 and -30
12x - 5(2x - 6) = 30 12 x - 10x + 30 = 30 2x = 0, x = 0 y = -6
3
The given expressions are: 5x + 5y = 30 3x - 5y = -30 Combine both equations to get: 5x + 3x + 5y - 5y = -30 + 30 8x = 0 Then: 8x/8 = 0/8 x = 0 Substitute that value for either of the expressions to get: 5(0) + 5y = 30 5y = 30 y = 30/5 y = 6 Therefore, the coordinates are x = 0 and y = 6.
Does this mean w^2 + w -30 = 0 ? If so, w = 5 or -6
480
-5/6
x2 + x - 30 = (x + 6)(x - 5)
x2 + 13x = -30 ∴ x2 + 13x + 30 = 0 ∴ (x + 3)(x + 10) = 0 ∴ x ∈ {-3, -10}
x2 + 11x + 30 = 0 (x + 5)(x + 6) = 0 so the roots are -5 and -6