Question

simplify and find the value of the following expression when a= -2, b= 1
1. 5(2-3a)+7b-11
2. 2(a2 - 3b) -5(7a-4)​

Answer 1

Answer:

1). 36 2). 92

Step-by-step explanation:

put the values a and b in question 1 and 2 .

Solve the question keeping in mind the sign.

Answer 2

Solution :-

putting a = (-2) and b = 1,

1) 5(2 - 3a) + 7b - 11

→ 5{2 - 3 * (-2)} + 7 * 1 - 11

→ 5(2 + 6) + 7 - 11

→ 5 * 8 - 4

→ 40 - 4

→ 36

2) 2(a² - 3b) -5(7a-4)

→ 2{(-2)² - 3*1) - 5{7 * (-2) - 4}

→ 2(4 - 3) - 5(-14 - 4)

→ 2 + 90

→ 92

Learn more :-

let a and b positive integers such that 90 less than a+b less than 99 and 0.9 less than a/b less than 0.91. Find ab/46

p...

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