Question

(x+7)^2=x^2+49 find the errors correct the following mathematical sentences.

Answer 1

Answer:

x²+14x+49≠x²+49

Step-by-step explanation:

(x+7)²=x²+49

(x+7)(x+7)=x²+49

x(x+7)+7(x+7)=x²+49

x²+7x+7x+49=x²+49

x²+14x+49≠x²+49

---------------------------------------------

i hope it will helps you friend

Answer 2

Given: Here we have $(x+7)^2=x^2+49$

To find: we have to find the errors correct the following mathematical sentences.

Step by step Solution:

Here we solve the given

(x+7)²=x²+49

(x+7)(x+7)=x²+49

x(x+7)+7(x+7)=x²+49

x²+7x+7x+49=x²+49

x²+14x+49≠x²+49

we have to find the error so that we an get the answer of x

if we change the sign of RHS and interchange the terms then,

(x+7)²=49-x²

(x+7)²=7²-x²

(x+7)²=(x+7)(7-x)

(x+7)=(7-x)

2x=0

x=0

Final answer:

Hence the correction is (x+7)²=49-x²