Simplify: 12"X"^2-(7"X"-overline(3"X"^2+15))

Simplify:

`12"x"^2-(7"x"-overline(3"x"^2+15))`

Sum

`12"x"^2-(7"x"-overline(3"x"^2+15))`

= 12x²− (7x − 3x²− 15)

= 12x² − 7x + 3x²+ 15

= 12x² + 3x² − 7x + 15

= 15x²− 7x + 15

shaalaa.com

Is there an error in this question or solution?

Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.

x + y = .......

Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.

`"y"/"x"` = ...........

If a = 3, b = 0, c = 2 and d = 1, find the value of a² + 2b² − 3c²

Show that the value of x³ – 8x² + 12x – 5 is zero, when x = 1.

If x = 2, y = 5 and z = 4, find the value of the following:

`("x"^2"y"^2"z"^2)/"xz"`

If a = 3, find the values of a² and 2^a.

If m = 2, find the difference between the values of 4m³ and 3m⁴.

Simplify:

12x − (5x + 2x)

Simplify:

(15b − 6b) − (8b + 4b)

Insert the bracket as indicated:

x − 2y = − (...................)