Expand the Following: (X - 5) (X - 4) - Mathematics

Expand the following:
(x - 5) (x - 4)

योग

(x - 5) (x - 4)
= x² -5x - 4x + 20
= x² - 9x + 20
(Using identify : (x - a) (x - b)
= x² - (a + b) x + ab).

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अध्याय 4: Expansions - Exercise 4.1

अध्याय 4 Expansions
Exercise 4.1 | Q 1.3

Factorise the following using appropriate identity:

4y² – 4y + 1

Expand the following, using suitable identity:

`[1/4a-1/2b+1]^2`

Factorise the following:

27y³ + 125z³

Simplify: `(a + b + c)^2 - (a - b + c)^2`

Evaluate of the following:

111³ − 89³

If a² - 3a + 1 = 0, and a ≠ 0; find:

Use the direct method to evaluate :
`("z"-2/3)("z"+2/3)`

If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :

`"a"^2 + (1)/"a"^2`

If `"p" + (1)/"p" = 6`; find : `"p"^4 + (1)/"p"^4`

Using suitable identity, evaluate the following:

101 × 102