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natali 33 [55]
3 years ago
13

(6.5)^2 - (1.5)^2 =?

Mathematics
2 answers:
Pepsi [2]3 years ago
7 0

6.5*6.5=42.25

1.5*1.5=2.25

(6.5)^2-(1.5)^2=42.25-2.25=40

Alex3 years ago
4 0

Answer:

40

Step-by-step explanation:

We can use difference of squares to evaluate, that is

a² - b² = (a - b)(a + b), thus

6.5² - 1.5² = (6.5 - 1.5)(6.5 + 1.5) = 5 × 8 = 40

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