Question

i) If a = 7 then find the value of 2a? + 3b? B 3 2a²-3b²​

Answer 1

Answer:value of b is -4.666 in equation (i)

The value of b in equation (ii) is 5.7154

Step-by-step explanation:we are given the value of a=7

We will put the value of a=7 in equation (i) i.e. 2a+3b

We get, 2×7+3b=0

14+3b=0

b=-14/3=-4.666

Now, in equation (ii) i.e., 2a²-3b²

Put value of a =7 which is already given in the question. We get,

2×(7)²-3b²=0

98-3b²=0

-3b²=-98

b²=98/3

b²=32.666

b=5.7154

Hence, the value of b in equation (ii) is 5.7154