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Kind of block 1
Contents of block 1Quadratic equations
Kind of block 2
Contents of block 2A quadratic equation has the form $ax^2 + bx + c = 0$ with $a$ not equal to zero. The two solutions come from the formula below.
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Contents of block 3x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}
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Contents of block 4The term under the radical is the discriminant. It decides how many real solutions exist.

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Quadratic equations. A quadratic equation has the form $ax^2 + bx + c = 0$ with $a$ not equal to zero. The two solutions come from the formula below. x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}. The term under the radical is the discriminant. It decides how many real solutions exist