expand by using suitable identity (-3x+5) (3x+5)
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Answer:
25 - 9x^2
Step-by-step explanation:
We will use this identity :-
(a - b) (a + b) = a^2 - b^2
(-3x + 5) (3x + 5)
= -1 (3x - 5) (3x + 5)
= -1 [(3x)^2 - 5^2]
= -1 (9x^2 - 25)
= -9x^2 + 25
= 25 - 9x^2
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