Which expression is a quadratic binomial? x2−9x 2x4+9x2−6x−1 7x² 3x4−2x

FIRST OPTION

Step-by-step explanation:

By definition you can classify a polynomial according to its number of terms. You can also classify it by its degree (the largest exponent is the degree).

Then, if the expression is a quadratic binomial (or a binomial of degree 2), it must have:

Therefore, based on this, you can conclude that the answer is the first option, which is shown below:

Step-by-step explanation:

7x+4y=5

     4Y = -7X +5

       y = -7/4x + 5/4

Slope m₁ =-7/4

Slope of the line parallel to this line m₂ = -7/4

Slope (m₃) of the line perpendicular to this line   m₃= 4/7

  m₁  * m₃ = -1

 -7/4 * m₃  = -1

         m₃  = -1 * (-4/7) = 4/7