Maths Assignment
4-a^2

(2-a)^2

(2+a) (2-a)...

Step-by-step explanation:

Use the identity:  a² - b² = (a+ b)(a - b)

4 - a² = 2² - a²        {Here a = 2 and b = a}

        = (2 +a) (2 - a)

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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