Select all of the following that are quadratic equations. 3x ^2 + 5x - 7 = 0 x ^3 - 2x ^2 + 1 = 0 2x - 1 = 0 5x ^2+ 15x = 0 6x - 1 = 4x + 7 x ^2 - 4x = 4x + 7

Question

asked Dec 21, 2018 140k views

2 Answers

Sonu Singh Bhati · Answer 1 · 2018-12-26T20:23:59+0000

Answer: First, Fourth, Sixth are correct options.

Explanation:

Since we know that

Quadratic equation are those equations in which the highest degree should be 2.

So, According to this rule, we get that

$3x ^2 + 5x - 7=0\\\\x ^2 - 4x=4x + 7\\\\5x ^2+ 15x=0$

Hence, First, Fourth, Sixth are correct options.