If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
'20 squared' simply means 20 multiplied by itself (20 x 20). This equals 400.
The solutions are: x = 4, y = 2 and x = -4, y = -2
x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}
2x2 + 3x - 20 = (x + 4)(2x - 5).
5x2 - 20 = 0x2 - 4 = 0x2 = 4x = +2 and -2
If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
4, -5
2 squared plus 2 squared equals 16 because 2 squared is 4 times 4 equals 16. Math: 4x4=16 so your answer is 16 :)!
It can not be factored because its discriminant is less than zero
20 = 400
20
'20 squared' simply means 20 multiplied by itself (20 x 20). This equals 400.
The solutions are: x = 4, y = 2 and x = -4, y = -2
x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}
2x2 + 3x - 20 = (x + 4)(2x - 5).
Simple. When a number is 'squared' it simply means it is multiplied by itself. So, '20 squared' means 20 x 20, which equals 400.