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It is 10.
Just substitute 4 in for X. 13 - 2(4) 13 - 8 = 5 ===
If x = 3, then x + 10 would be 3 + 10, which is 13.
4x^2 + 9 is a prime algebraic expression. Its numerical value may be prime of not - depending on the value of x.For x = 1, the value of the expression is 13 - a prime whereasfor x = 2, the value of the expression is 25 - not a prime.
13 x 10 = 130