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Q: What is the value of the expression x2 15 - 3x when x 4?

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The expression x2 + 3x +8 is a quadratic trinomial.

x2 + 3x - 5 is an expression, not an equation. An equation may have roots, an expression does not. However, x2 + 3x - 5 = 0 is an equation and its roots are -4.1926 and 1.1926 (approx).

x2 + 3x + 4 This is quadratic because the highest exponent of x is 2, and it is an expression because there is no equals sign.

x2+2x-15 = (x+5)(x-3) when factored

The factors of the expression, x2 + 3x - 4 are (x + 4) and (x - 1). As no binomials have been shown then the answer can be checked against the missing expressions to see if there is a match.

Related questions

The expression x2 + 3x +8 is a quadratic trinomial.

1

x2 + 3x - 5 is an expression, not an equation. An equation may have roots, an expression does not. However, x2 + 3x - 5 = 0 is an equation and its roots are -4.1926 and 1.1926 (approx).

The answer would be 3x if 'X2' is '2x', but if 'X2' is x2, then the total answer would be x2 + x.

the answers is d

3x-1 = 11 3x = 11+1 3x = 12 x = 4 Therefore: x2+2 = 18

- If 3X - 1 = 11, what is the value of X^2 + X?

If the expression is, x2 + 2x - 15 this has factors of (x + 5)(x - 3). If the expression is, x2 - 2x - 15 then the factors are (x - 5)(x + 3)

3x3 - 24x2 + 45x = 3x(x2 - 8x + 15) = 3x(x2 - 3x - 5x + 15) = 3x[ x(x - 3) - 5(x - 3) ] = 3x(x - 5)(x - 3)

The discriminant of the given quadratic expression is -7

48

x2-3x-28

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