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Popular >

expand (d+4e)(d-7e)

Solution

expand

(d + 4 e) (d - 7 e)

Solution

d^{2} - 3 e d - 28 e^{2}

Solution steps

(d + 4 e) (d - 7 e)

Apply FOIL method:

(a + b) (c + d) = a c + a d + b c + b d

a = d, b = 4 e, c = d, d = - 7 e

= dd + d (- 7 e) + 4 e d + 4 e (- 7 e)

Apply minus-plus rules

+ (- a) = - a

= dd - 7 e d + 4 e d - 4 \cdot 7 ee

Simplify

dd - 7 e d + 4 e d - 4 \cdot 7 ee : d^{2} - 3 e d - 28 e^{2}

= d^{2} - 3 e d - 28 e^{2}

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Frequently Asked Questions (FAQ)

What is expand (d+4e)(d-7e) ?
The solution to expand (d+4e)(d-7e) is d^2-3ed-28e^2