1st person to answer gets which expression represents 25x^2-81in factored form, and how? a.(5x+3)(5x-3)b.(5x-9)(5x-9)c.(5x+9 )(5x-9)

C. (5x+9)(5x-9)

Step-by-step explanation:

This is because of the difference in squares formula:

Realize that is the difference of two squares, and 81. This means that we can use the formula for the difference of two squares, which is:

In this case, we can say and . Taking the square root of both sides of the equations means that we will get the following:

Using our formula for the difference of squares, we get:

Thus, the answer would be Choice C, or (5x + 9)(5x - 9).

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

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