Question

the sum of two expression is 42x2-18y2.if one of them Is 15x2+8xy-y2,then find the other​

Answer 1

Answer:

27x2+8xy−19y2

Step-by-step explanation:

First number +Other number =Sum

15x2+8xy-y2 + ??=42x2-18y2

Sum -First number =Other number

42x2-18y2 --- 15x2+8xy-y2

=Let's simplify step-by-step.

42x2−18y2−15x2+8xy−y2

=42x2+−18y2+−15x2+8xy+−y2

Combine Like Terms:

=42x2+−18y2+−15x2+8xy+−y2

=(42x2+−15x2)+(8xy)+(−18y2+−y2)

=27x2+8xy+−19y2

Answer:

=27x2+8xy−19y2

Other number will be 27x2+8xy−19y2

Answer 2

yess first one is right answer