Question

find the product of:


solve with process.
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Answer 1

$\boxed{ \sf(3a - 8) \times (5b - 1)}$

$\sf \: 3a \times (5b - 1) - 8 \times (5b - 1)$

$\sf = 15ab - 3ab - 4ab + 8$

$\sf= 15ab - 4ab - 3a + 8$

$\boxed{ \sf 3a + 5b)(5a + 7)}$

$\sf \: = 15 {a}^{2} + 21ab + 35 {b}^{2} + 25ab$

$\sf \: = 15 {a}^{2} + 35 {b}^{2} +46ab$

$\boxed{ \sf(3a + 2b)(4a + 5b)}$

$\sf(3a \times 4a) + (3a \times 5b) + (2b \times 4a) + (2b \times 5b)$

$\sf = 12 {a}^{2} + 15ab + 8ab + 10 {b}^{2}$

$\boxed{ \sf(4x + y)(7x - 6y)}$

$\sf = 28 {x}^{2} - 24xy + 7xy - 6 {y}^{2}$

$\sf = 28 {x}^{2} - 17xy - 6 {y}^{2}$

$\boxed{ \sf(4a + 9)(a - 6)}$

$\sf = 4 {a}^{2} - 24a + 9a - 54$

$\sf = 4 {a}^{2} - 15a - 54$

Last one question is in Above attachment!

2 methods are there!

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