Question

(2x-y)²+5(2x-y)-300

Can I get a step by step explanation please ?

Answer 1

Step-by-step explanation:

first simplify the 1st term of the operation, the whole square term.

$(x + y) ^{2} = x {}^{2} + y {}^{2} + 2xy$

$4x {}^{2} + y {}^{2} - 4xy$

now the second term.

10x-5y

now put them all together with the according changes in the symbol.

$4x {}^{2} + y}^{2} - 4xy + 10x - 5y - 300 = 0$

then simplify.