Using properties of squares and square roots calculate : 200^ 2 − 198 ^2
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Using properties of squares and square roots calculate : 200^ 2 − 198 ^2
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200² - 198²
a² - b² = (a+b)(a-b)
(200 + 198)(200-198)
398× 2
796
200²-198²
200²-198²a²-b² = (a+b) (a-b)
200²-198²a²-b² = (a+b) (a-b)(200+198)(200-198)
200²-198²a²-b² = (a+b) (a-b)(200+198)(200-198)398×2
200²-198²a²-b² = (a+b) (a-b)(200+198)(200-198)398×2796