solve by using suitable identity (7x + 5)(7x - 8)
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Answered by
1
Answer:
Step-by-step explanation:
Given that,
( 7x + 5 ) ( 7x - 8 )
= 7x ( 7x - 8 ) + 5 ( 7x - 8 ) [∵ ( x + a ) ( x + b ) = x² + ( a + b ) x + ab ]
= 49x² - 56x + 35x - 40
= 49x² - 21x - 40
Answered by
0
Answer:
49x2 -21x -40
Step-by-step explanation:
(a+b)(a+c) = a2+ ab+ac + bc is the identity.
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