1. Solve the given equation for x: 2x+5 = 3
2. Solve the arithmetic expression using identity: - (20-7) (20+7)
Answers
Answered by
1
Answer:
1. x = -1
2. 351
Step-by-step explanation:
1. 2x+5=3
2x = 3-5
x=-2/2
x = -1
2. (20-7)(20+7)
Using Identity (a-b)(a+b) = a²-b²
a = 20, b= 7
= 20²-7²
= 400-49
= 351
Similar questions
Science,
2 months ago
Psychology,
2 months ago
World Languages,
4 months ago
Computer Science,
4 months ago
Math,
10 months ago