Please help I’m stuck
1 answer:
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Answer:
Concept:
Here, we need to know how to expand expressions like (a - b)(a + b).
For expressions like (a - b)(a + b), the expanded form must be:
<u>a² - b²</u>
For checking whether it is true:
(a - b)(a + b)
= a² - ab + ba - b²
= a² - b²
Solve:
<u>Given equation</u>
<u>Expand the parenthesis by the concept</u>
<u>Simplify the exponents</u>
<u>Add 22 on both sides</u>
Hope this helps!! :)
Please let me know if you have any questions
Answer:
4 units
Step-by-step explanation:
the area (A) of a triangle is calculated as
A = bh ( b is the base and h the height )
given A = 14 and h = 7 , then
× 7b = 14 ( multiply both sides by 2 to clear the fraction )
7b = 28 ( divide both sides by 7 )
b = 4 units