Math, asked by vandit3004, 10 months ago

(3x+4)(3x-5) Factorise​

Answers

Answered by spandhana238
1

Answer:

given

( 3x + 4 ) ( 3x - 5 )

either

3x ( 3x - 5 ) + 4 ( 3x - 5 )

= ( 3x )² - 5 × 3x + 4 × 3x - 5 × 4

= 9x² - 15x + 12x - 20

= 9x² - 3x - 20

or

3x - 5 = 0

x = 5/3

3x + 4 = 0

x = -4/3

Answered by AshwaryaRaj
2

Factorisation is 9x^2-x-20

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