Question

Please answer the question correctly while showing detailed working. ​

Answer 1

$\\ \sf\longmapsto 3a^4-5a-3+2a^3-a^2+2a-3+x=8a^4-3a^3+4a-8$

• x is third side

$\\ \sf\longmapsto 3a^4+2a^3-a^2+2a-5a-3-3+x=8a^4-3a^3+4a-8$

$\\ \sf\longmapsto 3a^4+2a^3-3a-6+x=8a^4-3a^3+4a-8$

$\\ \sf\longmapsto x=8a^4-3a^4-3a^3+2a^3+4a+3a-8+6$

$\\ \sf\longmapsto x=5a^4-a^3+7a-2$