Math, asked by sunilsinghk2008, 1 month ago

–5x²+38x–21 factorise step by step​

Answers

Answered by imprashant2488
1

STEP BY STEP EXPLANATION :

-5x^2 + 38x - 21 = 0

multiply by - both sides

so, 5x^2 - 38x + 21 = 0

5x^2 - ( 35 + 3 ) x + 21 = 0

5x^2 - 35x - 3x + 21 = 0

5x( x - 7 ) -3 ( x - 7 ) = 0

(5x - 3 ) ( x- 7 ) = 0

x= 3/5 or x = 7

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