This is a quadratic equation question which will have two answers:
2x2+42 = x2+13x
2x2-x2-13x+42 = 0
x2-13x+42 = 0
Factorising the equation gives you:
(x-6)(x-7) = 0
Therefore: x = 6 or x = 7
The expression cannot be factorised.
42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}
42 + 42 = 84
42 and 42
It is: 38+4 = 42
The expression cannot be factorised.
42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}
2x - 13x + 42 = x +ax + b a + b = 2(x - 6.5x + 21) = 34 = a + b
It is (x+6)(x+7) when factored
(x - 6)(x - 7)
42 + 42 = 84
42 and 42
It is: 38+4 = 42
28 + 42 = 70
7662
22
42