Question

If P=6x³- 8x² + 4x - 2 and Q=5 - 4x + 6x²- 8x³ , find P + 2Q.​

Answer 1

❒Given :

• P = 6x³ - 8x² + 4x - 2
• Q = 5 - 4x + 6x² - 8x³

❒ To Find :

• P + 2Q.

➤Solution :-

$\longrightarrow \sf P + 2Q$

$\longrightarrow \sf 6x^3 - 8x^2+ 4x - 2 + 2(5 - 4x + 6x^2- 8x^3)$

$\longrightarrow \sf 6x^3 - 8x^2+ 4x - 2 + 10 - 8x + 12x^2- 16x^3$

$\longrightarrow \sf 6x^3 - 16 x^3 - 8x^2 + 12x^2 + 4x - 8x - 2 + 10$

$\longrightarrow \underline{ \boxed{\tt - 10x^3 + 4x^2 - 4x + 8}}$

$\therefore{\underline{\sf{\pink {P + 2Q=-10x^3 + 4x^2 - 4x + 8.}}}}$

Answer 2

Refer the attachment...............