Question

simplify (y²-7) + (y²+7) +49
right answer will be mark be as brainliest ​

Answer 1

Answer:

y^4

Step-by-step explanation:

y^2(y^2+7)-7(y^2+7)+49

y^4+7y^2-7y^2-49+49

=y^4

Answer 2

Answer:

The value of ($y^{2}$ - 7) + ( $y^{2}$ + 7) +49 is 2$y^{2}$ +49

Step-by-step explanation:

($y^{2}$ - 7) + ( $y^{2}$ +7 ) +49

When the bracket is opened the sign of the terms which are inside the bracket will not change as there is plus sign before the bracket.

= $y^{2}$ - 7 + $y^{2}$ +7 +49

Here coefficient of $y^{2}$ is 1 on  both  the places .So we add 1 and 1 and it becomes 2 and +7 and -7 is equal to 0.

We can write it as,

=1$y^{2}$ +1 $y^{2}$ _7 +7 + 49

= 2 $y^{2}$ + 49