Question

if m= 7 n=5 verify that m-b=(m+n)(m-n)
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Answer 1

Answer:

b=-17

Step-by-step explanation:

Answer 2

Answer:

b= -17

Step-by-step explanation:

m-b=(m+n)(m-n)

using the identity we get,(a+b)(a-b)=a^2-b^2

7-b=7^2-5^2

7-b=49-25

7-b=24

-b=24-7

-b=17

b= -17