1.

If A = [1221] and f(x) = (1 + x) (1 – x), then f(a) is​

Answer»

ANSWER: pls mark me as a brainliest friend pls, I have GIVEN step by step explanation.

Step-by-step explanation:

Step 1 : value of A = ║1221 ║ = - 1221

Value of f(x) = (1 + x) (1 - x)

Step 2 : as we don’t have the simplified value of f(x), we have to simplify it

f(x) = (1 + x) (1 - x)

⇒ ( a + b ) ( a - b ) = a^{2} - b^{2}

So, (1 + x) (1 - x) = 1^{2} - x^{2}

= 1 - x^{2}

So, f(x) = 1 - x^{2}

Step 3 : now we have to FIND the value of “ f ”.

f(x) = 1 - x^{2}

= f = 1 - \frac{x^{2} }{x}

= f = 1 - x

Step 4 : we have found the value of both A and f. Now we have to find the value of f(a).

F(a) = f × a

F × a = ( 1 - x ) ( - 1221 )

= (1 × - 1221) ( -x × -1221 )

= (- 1221) ( 1221 x )

= - 1490841 x

Therefore, the value of f(a) is “ - 1490841 x ”.

Hope it’s useful friend…

Good luck and have a GREAT day dear…

Keep rocking !!



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