1. "Write the polynomial \(7x^5 - x(x + 2)\) in the form of a quadratic polynomial."

2. "Write the polynomial \(2x(x + 5) + 5\) in the form of a quadratic polynomial."

3. Let’s translate that into English: Express \(3x^2 + 7x + 23 = (x + 4)(x + 3) + 2\) in the form of a quadratic equation \(ax^2 + bx + c = 0\), where \(a \ne 0\).

4. Translate: Express \((x + 2)^3 = x(x^2 - 1)\) in the form of a quadratic equation \(ax^2 + bx + c = 0\), where \(a \ne 0\), and write down the coefficients of \(x^2\), \(x\), and \(x^0\) (i.e., the constant term).

5. Prove that the quadratic equation \(x^2(a^2+b^2) + 2(ac+bd)x + (c^2+d^2) = 0\) has no real roots when \(ad \ne bc\).

6. If the quadratic equation \(x^2 + px + q = 0\) has roots \(\alpha\) and \(\beta\), then find the value of \(\alpha^3 + \beta^3\).

7. If the quadratic equation \(ax^2 + 7x + b = 0\) has roots \(\cfrac{2}{3}\) and \(-3\), then find the values of \(a\) and \(b\).

8. Let us express \(3x^2 + 7x + 23 = (x + 4)(x + 3) + 2\) in the form of a quadratic equation \(ax^2 + bx + c = 0\), where \(a ≠ 0\).

9. Let us check whether \(0\) and \(-2\) are roots of the quadratic equation \(8x^2 + 7x = 0\).

10. If the quadratic equation \(ax^2 + 7x + b = 0\) has two roots \(\frac{2}{3}\) and \(-3\), then let us find the values of \(a\) and \(b\).

11. Express the equation \(x^3 - 4x^2 - x + 1 = (x + 2)^3\) in the standard form of a quadratic equation and write the coefficients of \(x^2\), \(x\), and \(x^0\).

12. A quadratic equation in one variable \(x\), with real coefficients, has equal coefficients for \(x^2\) and the constant term. Show with reasoning that any other quadratic equation whose roots are the reciprocals of the original equation's roots must be identical to the original equation.

13. A specific quadratic equation has equal coefficients for \(x^2\) and the constant term (\(x^0\)) — Show with reasoning that the equation whose roots are the reciprocals of this equation’s roots is identical to the original equation.

14. What should be the value of \(a\) so that the quadratic equation \(x^2 - (3a - 1)x + 2a^2 + 2a - 11 = 0\) has equal roots?