Question

simplify : a²- 2a+{5a²- (3 - 4a²)}​

Answer 1

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Answer 2

a²- 2a+{5a²- (3 - 4a²)}​

Opening brackets (- * - = + ),

= a²- 2a+ 5a²- 3 + 4a²​

Bringing all like terms together,

= a²​ + 5a² + 4a² - 2a -3

= 10a² - 2a -3

= 2a(5a-1) - 3

Hence, a²- 2a+{5a²- (3 - 4a²)} simplifies to 2a(5a-1) - 3.