find the product 1. (5a-7b)² 2. (4y+5)² 3. (2x+3y)² 4. (3x-4y)². 5. (½s+⅔t)²
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Hølà mate❤️.
1) (5a-7b)^2
(5a)^2 + (7b)^2 - 2 into 5a into 7b
25a^2 + 49b^2 - 70ab
2) (4y+5)×(4y+5)
4y(4y)+4y(5)+5(4y)+5(5)
4y×4y= 16y²
4y×5=20y
5×4y=20y
5×5=25
20+20=40y
16y²+40y+25
3) (2x-3y)^2
(2x)^2 - 2(2x)(3y) + (3y)^2
4x^2 - 12xy + 9y^2
4) (3x - 4y)²
= (3x)² - 2(3x)(4y) + (4y)²
= 9x² - 24xy + 16y²
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