找到你今天要练的题。

The expression 4x² + bx - 45, where b is a constant, can be rewritten as (hx + k )(x + j ), where h, k, and j are integer constants. Which of the following must be an integer?

The expression \( \frac{1}{3}x^2-2 \)  can be rewritten as \( \frac{1}{3}\left(x-k\right)\left(x+k\right) \) , where k is a positive constant. What is the value of k ?

Which of the following is equivalent to \( \left(a+\frac{b}{2}\right)^2 \)  ?

If a = c + d , which of the following is equivalent to the expression x² - c² - 2cd - d²?

Which of the following expressions is(are) a factor of 3x² + 20x - 63 ?

I.x - 9
II.3x - 7

The expression (3x -23)(19x + 6) is equivalent to the expression ax² + bx + c , where a, b , and c are constants. What is the value of b ?

0.36x² + 0.63x +1.17
The given expression can be rewritten as a(4x² + 7x +13), where a is a constant. What is the value of a ?

Which expression is equivalent to 256w²-676?

Which expression is a factor of 2x²+38x +10?

Which expression is equivalent to 50x² +5x² ?

Which expression is equivalent to \( 19\left(x^2-7\right) \)  ?

Which expression is equivalent to \( 17\left(x^2-100y^2\right) \)?