Question

$multiply \:(2x {}^{2} + 3x - 5) \: by \: (3x {}^{2} - 5x + 4)$
2nd question
simplify
$4a(2a {}^{2} - 6a) - a {}^{2} (a + 2) - 3a(5a {}^{2} - 4a + 3)$
simplify
$4y(3y {}^{2} + 5y - 7) + 2( y {}^{3} - 4y {}^{2} + 5)$
please do it it's urgent who give the all answer i will mark in brainliest

Answer 1

Answer 1.

$(2 {x}^{2} + 3x - 5) \: (3 {x}^{2} - 5x + 4)$

$(2 {x}^{2} \times 3 {x}^{2} - 2 {x}^{2} \times 5x + 2 {x}^{2} \times 4) + ( 3x\times 3 {x}^{2} - 3x \times 5x \: + 3x \times 4) \: - (5 \times 3 {x}^{2} + 5 \times 5x - 5 \times 4)$

Now, by adding and cutting we get

$= 6{x}^{4} + 8 {x}^{2} + 37x - 20$

2. Simplify

answer is
= -8a^3 - 14a^2 - 9a
3. Simplify
answer is
= 14y^3 + 12y^2 - 28y + 10



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