nmm5
nmm5 nmm5
  • 23-09-2019
  • Mathematics
contestada

quadratic factorise x^2-36=0?

Respuesta :

jimrgrant1 jimrgrant1
  • 23-09-2019

Answer:

(x - 6)(x + 6) = 0

Step-by-step explanation:

This is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

Given

x² - 36 = 0, then

x² - 6² = 0

(x - 6)(x + 6) = 0 ← in factored form

Answer Link
majasolt majasolt
  • 23-09-2019

Answer:

(x-6)(x+6) = 0

Step-by-step explanation:

x to the power of 2 minus 36.

6 squared is 36 so therefore. you must have 2 6's in the brackets somewhere.

then the 2 x's need to be there too.

another example can be.

x^2-81=0

it would be (x-9)(x+9)=0

you just always have the plus and minus int he brackets

Answer Link

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