Question

what term be added to make perfect square?
(i). 4a^2 + 28a​

Answer 1

Answer:

$49$

Step-by-step explanation:

$4a^2+28a+49=(2a)^2+2(7)(2a)+7^2=(2a+7)^2$

Answer 2

Answer:

1. 4a² = (2a)²

28a = 2(2a)7

∴ The answer is 7² = 49.

4a² + 28a + 49 = (2a + 7)²

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