Show that x2 plus 8x-40 equals 0?

Anonymous

∙ 16y ago

Updated: 8/17/2019

An equation, such as the one above, may be true for some values of the variable(s). There need not be any solution in the relevant domain.

To "show" something, in this context, you need an identity - an equation that is true whatever the value of the variable.

The above is NOT an identity, since for x=0 is gives -40 = 0 which is clearly not true.

Wiki User

∙ 16y ago

What else can I help you with?

What does x2 plus x2 equals?

x2 + x2 = 2x2

What does x2 plus 6-40 equal?

It equals x2 - 34

X2 plus 6x plus 8 equals?

The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)

X2 plus 7 equals 36?

if x2 + 7 = 37, then x2 = 29 and x = ±√29

What is X2 plus 10x plus 21 equals?

x2 + 10x + 21 = (x + 3)(x + 7)

If z equals yf x2 - y2 show that ydz divided by dx plus xdz divided by dy equals xz divided by y?

What is the answer for x2 plus 1 plus 3x4 equals 2?

-7.5?

X2 plus 3x plus 10 equals 0?

-2

How do you solve x2 plus 3x plus 3 0?

x2 plus 3x plus 3 is equals to 0 can be solved by getting the roots.

How do you solve the equation. X2 plus y2 plus z2 - 4x plus 4y plus 2z plus 5 equals 0 x2 plus y2 plus z2 equals 4?

(2-r)e-rr

What is the radius of x2 plus y2 equals 9?

X2 or 2 times x?

What is x2 plus 7x equals - 2x2 plus 6 in the form ax2 bx c equals 0?

x2 + 7x = 2x2 + 6 x2 - 2x2 + 7x = 6 -x2 +7x - 6 = 0 or alternatively x2 - 7x + 6 = 0