36. 4 squared is 16...16 + 20 - = 36.
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3² + 20 ÷ 2² = 9 + (20 ÷ 4) = 14.
4 plus (4 squared) = 8
If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored
x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}
6x2+23x+20=0x= .7275 and -4.5634Improved Answer:-6x2+23x+20 = (3x+4)(2x+5) when factored