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Subjects>Math>Math & Arithmetic

How do you factor x squared minus 4x minus 21?

Updated: 12/21/2022

Wiki User

∙ 12y ago

Best Answer

x2 - 4x - 21 = (x-7)(x+3)

Wiki User

∙ 12y ago

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Continue Learning about Math & Arithmetic

How do you factor 4x squared minus 2x?

2x(2x - 1)

How do you factor 8X squared minus 2X minus 1?

(2x - 1)(4x + 1)

How do you factor 4x squared minus 4?

4(x - 1)(x + 1)

How do you factor 4x minus t squared?

(4x - t2)= [(2â&circ;&scaron;x)2 - t2] (This is now the difference of squares)= (2â&circ;&scaron;x - t)(2â&circ;&scaron;x + t)

Factor completely -use 2 methods- 4x squared plus 4x minus 8?

4x2+4x-8 4(x2+x-2) and (4x+8)(x-1)

Related questions

How do you factor 4x squared minus 2x?

2x(2x - 1)

How do you factor 8X squared minus 2X minus 1?

(2x - 1)(4x + 1)

How do you factor 4x squared minus 4x plus 1?

(2x-1)(2x-1) = 4x^2 -4x + 1

How do you factor 4x squared minus 1?

(2x - 1)(2x + 1)

How do you factor 2x squared plus 4x minus 1?

There is no rational factorisation.

How do you factor 4x squared minus 4?

4(x - 1)(x + 1)

How do you factor 8x squared plus 6x minus 9?

(4x - 3)(2x + 3)

Would you please factor 4x squared minus 2x minus 12?

(2x - 4)(2x + 3) The key is to look for all the factor pairs of 12.

What is 7x squared minus 4x minus 5x squared plus 2x?

7x2 -4x -5x2 +2x = 2x2 -2x

How do you factor 4x minus t squared?

(4x - t2)= [(2â&circ;&scaron;x)2 - t2] (This is now the difference of squares)= (2â&circ;&scaron;x - t)(2â&circ;&scaron;x + t)

Factor completely -use 2 methods- 4x squared plus 4x minus 8?

4x2+4x-8 4(x2+x-2) and (4x+8)(x-1)

How do you factor 8 x squared minus ten x minus three?

8x2-10x-3 = (2x-3)(4x+1) when factored

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