30x^2+7x-15 factorisation ...............................................................
Answers
Answered by
4
Answer:
Step-by-step explanation:
30x^2+25x-18x-15 (30×15=450 and 25×18=450 ;25-18=7)
5x(6x+5)-3(6x+5)
(5x-3)(6x+5)
5x-3=0 6x+5=0
5x=3 6x= -5
x=3/5 x= -5/6
Answered by
6
Answer:
30x² + 7x - 15
=> 30x² + 25x - 18x - 15
=> 5x ( 6x + 5 ) - 3 ( 6x + 5 )
=> ( 6x + 5 )( 5x - 3 )
Further if you need zeroes -
x = -5/6 or x = 3/5
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