Expand the Following: (3x + 4) (2x - 1)

Expand the following:
(3x + 4) (2x - 1)

योग

(3x + 4) (2x - 1)
= 6x²- 3x + 8x - 4
= 6x² + 5x - 4
(Using identity : (x+ a) (x -b)
= x² + (a - b) x - ab).

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अध्याय 3: Expansions - Exercise 4.1

अध्याय 3 Expansions
Exercise 4.1 | Q 1.4

Find the following product:

(4x − 5y) (16x² + 20xy + 25y²)

If x = 3 and y = − 1, find the values of the following using in identify:

(9y²− 4x²) (81y⁴ +36x²y² + 16x⁴)

If a + b = 8 and ab = 6, find the value of a³ + b³

If x + \[\frac{1}{x}\] = then find the value of \[x^2 + \frac{1}{x^2}\].

Use the direct method to evaluate the following products:

(x + 8)(x + 3)

Use the direct method to evaluate :
(xy+4) (xy−4)

Use the direct method to evaluate :
(3x²+5y²) (3x²−5y²)

Expand the following:
(m + 8) (m - 7)

Find the squares of the following:
(2a + 3b - 4c)

Simplify:
(7a +5b)² - (7a - 5b)²