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x2 + 9x + 20 = 0

∴(x + 4)(x + 5) = 0

∴x ∈ {-5, -4}

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Q: X squared plus nine x plus 20 equals 0?

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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

Simple. When a number is 'squared' it simply means it is multiplied by itself. So, '20 squared' means 20 x 20, which equals 400.

x2 = x+20 x2-x-20 = 0 (x-5)(x+4) = 0 x = 5 or x = -4

Related questions

4, -5

If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored

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

x squared plus 9x plus 20.

20 = 400

4.472

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

7/20 + 3/9 = 41/60

Simple. When a number is 'squared' it simply means it is multiplied by itself. So, '20 squared' means 20 x 20, which equals 400.

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